c hapter 3 s ection 3 energy and work: why air bags?
TRANSCRIPT
CHAPTER 3 SECTION 3Energy and Work Why Air Bags
PHYSICS 33 ENERGY AND WORKHOMEWORK 1-10 SKIP 4 AND 7 DUE FRIDAY
Learning Objective Students will be able
to describe the relationship between stopping distance and force required to stop an object
Success Criteria Model an automobile
air bag Relate W=FD to the
eggsperiment (get it)
Do Now QUIZ
Agenda Do Now Investigate 33 SummaryExit Ticket
EGG LAB
Dropping Eggs Throwing an egg in a blanket
EXIT TICKET
How did the indentation of the egg in the flour change as you increased the initial drop height
PHYSICS TALK 33 Learning Objective
Students will be able to explain the relationship between work and kinetic energy
Success Criteria Students will be able to
explain the relationship between stopping distance and force required to stop
Students will be able to explain the relationship between velocity and braking distance
Students will describe which features of a car help in the case of a collision
Do Now WDYSWDYT p 277
Agenda Do Now Physics Talk 33 What do you think
now Summary
PHYSICS TALK 33
What is kinetic energy
What is the equation
The energy an object has because of its motion
2
2
1mvKE
KINETIC ENERGY AND THE EGGS
The two eggs were dropped from the same height Which had more kinetic energy
Since both eggs had approximately the same mass and same relative velocity they about the same kinetic energy
MEASURING FORCE OVER A DISTANCE
How was the egg able to stop
How do you measure the distance in each egg drop
The surface had to apply a force over some distance
When the egg was dropped in flour you can measure the indentation With the hard surface you cannot see the indentation
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
PHYSICS 33 ENERGY AND WORKHOMEWORK 1-10 SKIP 4 AND 7 DUE FRIDAY
Learning Objective Students will be able
to describe the relationship between stopping distance and force required to stop an object
Success Criteria Model an automobile
air bag Relate W=FD to the
eggsperiment (get it)
Do Now QUIZ
Agenda Do Now Investigate 33 SummaryExit Ticket
EGG LAB
Dropping Eggs Throwing an egg in a blanket
EXIT TICKET
How did the indentation of the egg in the flour change as you increased the initial drop height
PHYSICS TALK 33 Learning Objective
Students will be able to explain the relationship between work and kinetic energy
Success Criteria Students will be able to
explain the relationship between stopping distance and force required to stop
Students will be able to explain the relationship between velocity and braking distance
Students will describe which features of a car help in the case of a collision
Do Now WDYSWDYT p 277
Agenda Do Now Physics Talk 33 What do you think
now Summary
PHYSICS TALK 33
What is kinetic energy
What is the equation
The energy an object has because of its motion
2
2
1mvKE
KINETIC ENERGY AND THE EGGS
The two eggs were dropped from the same height Which had more kinetic energy
Since both eggs had approximately the same mass and same relative velocity they about the same kinetic energy
MEASURING FORCE OVER A DISTANCE
How was the egg able to stop
How do you measure the distance in each egg drop
The surface had to apply a force over some distance
When the egg was dropped in flour you can measure the indentation With the hard surface you cannot see the indentation
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
EGG LAB
Dropping Eggs Throwing an egg in a blanket
EXIT TICKET
How did the indentation of the egg in the flour change as you increased the initial drop height
PHYSICS TALK 33 Learning Objective
Students will be able to explain the relationship between work and kinetic energy
Success Criteria Students will be able to
explain the relationship between stopping distance and force required to stop
Students will be able to explain the relationship between velocity and braking distance
Students will describe which features of a car help in the case of a collision
Do Now WDYSWDYT p 277
Agenda Do Now Physics Talk 33 What do you think
now Summary
PHYSICS TALK 33
What is kinetic energy
What is the equation
The energy an object has because of its motion
2
2
1mvKE
KINETIC ENERGY AND THE EGGS
The two eggs were dropped from the same height Which had more kinetic energy
Since both eggs had approximately the same mass and same relative velocity they about the same kinetic energy
MEASURING FORCE OVER A DISTANCE
How was the egg able to stop
How do you measure the distance in each egg drop
The surface had to apply a force over some distance
When the egg was dropped in flour you can measure the indentation With the hard surface you cannot see the indentation
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
EXIT TICKET
How did the indentation of the egg in the flour change as you increased the initial drop height
PHYSICS TALK 33 Learning Objective
Students will be able to explain the relationship between work and kinetic energy
Success Criteria Students will be able to
explain the relationship between stopping distance and force required to stop
Students will be able to explain the relationship between velocity and braking distance
Students will describe which features of a car help in the case of a collision
Do Now WDYSWDYT p 277
Agenda Do Now Physics Talk 33 What do you think
now Summary
PHYSICS TALK 33
What is kinetic energy
What is the equation
The energy an object has because of its motion
2
2
1mvKE
KINETIC ENERGY AND THE EGGS
The two eggs were dropped from the same height Which had more kinetic energy
Since both eggs had approximately the same mass and same relative velocity they about the same kinetic energy
MEASURING FORCE OVER A DISTANCE
How was the egg able to stop
How do you measure the distance in each egg drop
The surface had to apply a force over some distance
When the egg was dropped in flour you can measure the indentation With the hard surface you cannot see the indentation
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
PHYSICS TALK 33 Learning Objective
Students will be able to explain the relationship between work and kinetic energy
Success Criteria Students will be able to
explain the relationship between stopping distance and force required to stop
Students will be able to explain the relationship between velocity and braking distance
Students will describe which features of a car help in the case of a collision
Do Now WDYSWDYT p 277
Agenda Do Now Physics Talk 33 What do you think
now Summary
PHYSICS TALK 33
What is kinetic energy
What is the equation
The energy an object has because of its motion
2
2
1mvKE
KINETIC ENERGY AND THE EGGS
The two eggs were dropped from the same height Which had more kinetic energy
Since both eggs had approximately the same mass and same relative velocity they about the same kinetic energy
MEASURING FORCE OVER A DISTANCE
How was the egg able to stop
How do you measure the distance in each egg drop
The surface had to apply a force over some distance
When the egg was dropped in flour you can measure the indentation With the hard surface you cannot see the indentation
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
PHYSICS TALK 33
What is kinetic energy
What is the equation
The energy an object has because of its motion
2
2
1mvKE
KINETIC ENERGY AND THE EGGS
The two eggs were dropped from the same height Which had more kinetic energy
Since both eggs had approximately the same mass and same relative velocity they about the same kinetic energy
MEASURING FORCE OVER A DISTANCE
How was the egg able to stop
How do you measure the distance in each egg drop
The surface had to apply a force over some distance
When the egg was dropped in flour you can measure the indentation With the hard surface you cannot see the indentation
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
KINETIC ENERGY AND THE EGGS
The two eggs were dropped from the same height Which had more kinetic energy
Since both eggs had approximately the same mass and same relative velocity they about the same kinetic energy
MEASURING FORCE OVER A DISTANCE
How was the egg able to stop
How do you measure the distance in each egg drop
The surface had to apply a force over some distance
When the egg was dropped in flour you can measure the indentation With the hard surface you cannot see the indentation
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
MEASURING FORCE OVER A DISTANCE
How was the egg able to stop
How do you measure the distance in each egg drop
The surface had to apply a force over some distance
When the egg was dropped in flour you can measure the indentation With the hard surface you cannot see the indentation
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
BRAKING A CAR
How do auto brakes work
The braking system has to eliminate the kinetic energy of the vehicle by applying a large force over a large distance
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
WORK
How do you calculate work
How does work relate to kinetic energy
W=FD
Work is the change in kinetic energy We can write this as
KEW
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
BRAKING A CAR
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
EXAMPLE
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
WHAT ABOUT THE EGGS
How does this apply to the eggs
When the egg could be stopped over a greater distance there was less damage to it because less force had to be applied
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
How does this apply to a car crash
Airbags These allow you to have more distance to stop your body so you will be less likely to get hurt
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
If you are traveling three-times the speed will you need three times the braking distance
False You will need 9 times the stopping distance This is because in the formula the velocity is squared
2
2
1mvKE
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
Why is it harder to stop on icy or wet roads
The slippery surface makes it more difficult to supply a sufficient force so it is necessary to give yourself more distance
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
What else helps stop an automobile
The crumple zone of a car allows the car to have more distance to stop This is why cars are designed to dent and are not made out of more sturdy material
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
SAMPLE PROBLEM
p286 and 287 Sample Problem
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-
WHAT DO YOU THINK NOW
Exit Ticket How does and air bag protect you during an accident
- Chapter 3 Section 3
- Physics 33 Energy and Work Homework 1-10 Skip 4 and 7 Due Fr
- Egg Lab
- Exit Ticket
- Physics Talk 33
- Physics Talk 33 (2)
- Kinetic Energy and the Eggs
- Measuring Force Over a Distance
- Braking a Car
- Work
- Braking a Car (2)
- Example
- What about the eggs
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Sample Problem
- What do you think now
-