momentum and impulse unit 6. momentum (p) definition- the amount of motion an object has. (vector...
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![Page 1: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/1.jpg)
Momentum and ImpulseUnit 6
![Page 2: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/2.jpg)
Momentum (p)
Definition- The amount of motion an object has. (vector quantity)
units- kg∙m/s
p = mv
![Page 3: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/3.jpg)
Momentum
If a car has a mass of 1,500kg and is being driven with a velocity of 15 m/s, what is it’s momentum?
![Page 4: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/4.jpg)
Momentum
If a car has a mass of 1,500kg and is being driven with a velocity of 15 m/s, what is it’s momentum?
m = 1,500kgv = 15 m/s
![Page 5: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/5.jpg)
Momentum
If a car has a mass of 1,500kg and is being driven with a velocity of 15 m/s, what is it’s momentum?
m = 1,500kgv = 15 m/s
p = mv
![Page 6: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/6.jpg)
Momentum
If a car has a mass of 1,500kg and is being driven with a velocity of 15 m/s, what is it’s momentum?
m = 1,500kgv = 15 m/s
p = mv
p = (1,500kg) (15 m/s)
![Page 7: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/7.jpg)
Momentum
If a car has a mass of 1,500kg and is being driven with a velocity of 15 m/s, what is it’s momentum?
m = 1,500kgv = 15 m/s
p = mv
p = (1,500kg) (15 m/s)
p = 22, 500 kg m/s
![Page 8: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/8.jpg)
Momentum
A student is riding a bike down a pathway. The combined mass of the student and the bike is 120 kg. If the student and the bike have a momentum of 180 kg m/s, what is their velocity?
![Page 9: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/9.jpg)
Momentum
A student is riding a bike down a pathway. The combined mass of the student and the bike is 120 kg. If the student and the bike have a momentum of 180 kg m/s, what is their velocity?
m = 120kg p = 180 kg m/s
![Page 10: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/10.jpg)
m = 120kg p = 180 kg m/s
![Page 11: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/11.jpg)
m = 120kg p = 180 kg m/s
p = mv
![Page 12: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/12.jpg)
m = 120kg p = 180 kg m/s
p = mv
180 kg m/s = 120kg v
![Page 13: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/13.jpg)
m = 120kg p = 180 kg m/s
p = mv
180 kg m/s = 120kg v
v = 1.5 m/s
![Page 14: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/14.jpg)
A cart has a momentum of 15 kg m/s. If the cart has a velocity of 3 m/s, what is the mass of the cart?
![Page 15: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/15.jpg)
A cart has a momentum of 15 kg m/s. If the cart has a velocity of 3 m/s, what is the mass of the cart?
p = 15 kg m/sv = 3 m/s
![Page 16: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/16.jpg)
A cart has a momentum of 15 kg m/s. If the cart has a velocity of 3 m/s, what is the mass of the cart?
p = 15 kg m/sv = 3 m/s
p = mv
![Page 17: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/17.jpg)
A cart has a momentum of 15 kg m/s. If the cart has a velocity of 3 m/s, what is the mass of the cart?
p = 15 kg m/sv = 3 m/s
p = mv
15 kg m/s = m 3 m/s
![Page 18: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/18.jpg)
A cart has a momentum of 15 kg m/s. If the cart has a velocity of 3 m/s, what is the mass of the cart?
p = 15 kg m/sv = 3 m/s
p = mv
15 kg m/s = m 3 m/s
m = 5 kg
![Page 19: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/19.jpg)
Do Now
1) Units for mass2) Units for velocity3) Units for momentum
4) Find the velocity of a 1,500kg car which has a momentum of 5,400 kg·m/s.
![Page 20: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/20.jpg)
Answers
1) Kg
2) m/s
3) Kg·m/s
4) 3.6 m/s
![Page 21: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/21.jpg)
#4
m = 1,500 kgp = 7,500 kg·m/s
v = ?
![Page 22: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/22.jpg)
#4
m = 1,500 kgp = 7,500 kg·m/s
p = mvv = ?
![Page 23: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/23.jpg)
#4
m = 1,500 kgp = 7,500 kg·m/s
p = mv
7,500 kg·m/s = 1,500kg v
v = ?
![Page 24: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/24.jpg)
#4
m = 1,500 kgp = 7,500 kg·m/s
p = mv
7,500 kg·m/s = 1,500kg v
v = ?
1,500 kg 1,500 kg
![Page 25: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/25.jpg)
#4
m = 1,500 kgp = 7,500 kg·m/s
p = mv
7,500 kg·m/s = 1,500kg v
v = ?
1,500 kg 1,500 kg
![Page 26: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/26.jpg)
#4
m = 1,500 kgp = 7,500 kg·m/s
p = mv
7,500 kg·m/s = 1,500kg v
3.6 m/s = v
v = ?
1,500 kg 1,500 kg
![Page 27: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/27.jpg)
Throwing a Tennis Ball
What will happen when I throw a tennis ball against the wall?
![Page 28: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/28.jpg)
Throwing a Tennis Ball
What will happen when I throw a tennis ball against the wall?
What will happen when I throw the tennis ball into the sheet?
![Page 29: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/29.jpg)
Throwing a Tennis Ball
What will happen when I throw a tennis ball against the wall?
What will happen when I throw the tennis ball into the sheet?
If you think something different happens, why?
![Page 30: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/30.jpg)
Throwing an Egg
During the lesson, keep the following questions in mind:
1) If I were to throw an egg against the wall, what will happen to the egg?
![Page 31: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/31.jpg)
Throwing an Egg
During the lesson, keep the following questions in mind:
1) If I were to throw an egg against the wall, what will happen to the egg?
2) If I throw the egg into the sheet, what will happen to the egg?
![Page 32: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/32.jpg)
Throwing an Egg
During the lesson, keep the following questions in mind:
1) If I were to throw an egg against the wall, what will happen to the egg?
2) If I throw the egg into the sheet, what will happen to the egg?
3) What is different?
![Page 33: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/33.jpg)
![Page 34: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/34.jpg)
![Page 35: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/35.jpg)
![Page 36: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/36.jpg)
![Page 37: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/37.jpg)
m m
![Page 38: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/38.jpg)
m m
![Page 39: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/39.jpg)
![Page 40: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/40.jpg)
tt
![Page 41: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/41.jpg)
t
![Page 42: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/42.jpg)
a = FNet / m a = ∆v / t
FNet t = m ∆v
![Page 43: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/43.jpg)
a = FNet / m a = ∆v / t
FNet t = m ∆v
FNet t = ∆p
![Page 44: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/44.jpg)
Impulse (J)
Definition- A force applied for a given time which results in a change in momentum.
Units- N ∙ s
J = FNett = ∆p = m∆v
** t is the time for the object to come to a stop after hitting another object**
![Page 45: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/45.jpg)
A 1,500kg car is driving East with a velocity of 15 m/s. If the driver presses the brake and stops the car, what is the impulse exerted on the car?
![Page 46: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/46.jpg)
A 1,500kg car is driving East with a velocity of 15 m/s. If the driver presses the brake and stops the car, what is the impulse exerted on the car?
Givens:
m = 1,500kgvi = 15 m/svf = 0 m/s
![Page 47: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/47.jpg)
A 1,500kg car is driving East with a velocity of 15 m/s. If the driver presses the brake and stops the car, what is the impulse exerted on the car?
Givens:
m = 1,500kgvi = 15 m/svf = 0 m/s
Unknown:
J = ?
![Page 48: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/48.jpg)
A 1,500kg car is driving East with a velocity of 15 m/s. If the driver presses the brake and stops the car, what is the impulse exerted on the car?
Givens:
m = 1,500kgvi = 15 m/svf = 0 m/s
Unknown:
J = ?
Equation:
J = m∆v
![Page 49: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/49.jpg)
A 1,500kg car is driving East with a velocity of 15 m/s. If the driver presses the brake and stops the car, what is the impulse exerted on the car?
Givens:
m = 1,500kgvi = 15 m/svf = 0 m/s
Unknown:
J = ?
Equation:
J = m∆v
J = m (vf – vi)
![Page 50: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/50.jpg)
A 1,500kg car is driving East with a velocity of 15 m/s. If the driver presses the brake and stops the car, what is the impulse exerted on the car?
Givens:
m = 1,500kgvi = 15 m/svf = 0 m/s
Unknown:
J = ?
Equation:
J = m∆v
J = 1,500kg (0m/s – 15m/s)
![Page 51: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/51.jpg)
A 1,500kg car is driving East with a velocity of 15 m/s. If the driver presses the brake and stops the car, what is the impulse exerted on the car?
Givens:
m = 1,500kgvi = 15 m/svf = 0 m/s
Unknown:
J = ?
Equation:
J = m∆v
J = 1,500kg (0m/s – 15m/s)
J = -22,500 N·s
![Page 52: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/52.jpg)
OR
If this car crashed into one of these two objects, which object would cause a greater change in momentum?
![Page 53: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/53.jpg)
OR
If this car crashed into one of these two objects, which object would cause a greater change in momentum? Hint: ∆p = m∆v
![Page 54: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/54.jpg)
OR
If this car crashed into one of these two objects, which object would cause a greater change in momentum? Hint: ∆p = m∆v
They cause the same ∆p
![Page 55: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/55.jpg)
OR
If this car crashed into one of these two objects, which object would cause a greater impulse?
![Page 56: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/56.jpg)
OR
If this car crashed into one of these two objects, which object would cause a greater impulse?
They cause the same impulse
![Page 57: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/57.jpg)
OR
If this car crashed into one of these two objects, which object would cause a greater impulse?
J = ∆p
![Page 58: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/58.jpg)
OR
Which object will cause more damage to the car? Why?
![Page 59: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/59.jpg)
OR
Which object will cause more damage to the car? Why?
J = F t
If J stays the same, and t is increased, F must decrease
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What safety devices keep us safe in the event of an accident?
How does each one work?
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How does a parachute work?
What physical value(s) does a parachute change to keep you safe?
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Throwing an Egg
If I were to throw an egg against the wall, what would happen?
If I throw the egg into the sheet, what will happen?
What is different?
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Conservation of Momentum
In a closed system (free from outside forces) the total momentum of the motion does not change.
pbefore = pafter
“before” and “after” refer to before and after the collision.
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Bouncy (Elastic) Collisions
Objects start out separate and end separate.ex: a bat hitting a baseball
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For bouncy collisions:
pbefore = pafter
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For bouncy collisions:
pbefore = pafter
p1before + p2before = p1after + p2after
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For bouncy collisions:
pbefore = pafter
p1before + p2before = p1after + p2after
m1v1before + m2v2before = m1v1after + m2v2after
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For bouncy collisions:
pbefore = pafter
p1before + p2before = p1after + p2after
m1v1before + m2v2before = m1v1after + m2v2after
These are interchangeable
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Cart A has a mass of 10kg. Cart B has a mass of 12kg. Cart A is moving East with a velocity of 5 m/s. Cart B is moving West with a velocity of 3 m/s and collides with cart A. If cart B is moving 1 m/s East after the collision, what is the velocity of cart A after the collision?
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Cart A has a mass of 10kg. Cart B has a mass of 12kg. Cart A is moving East with a velocity of 5 m/s. Cart B is moving West with a velocity of 3 m/s and collides with cart A. If cart B is moving 1 m/s East after the collision, what is the velocity of cart A after the collision?
Givens: mA = 10kg mB = 12kg
vAbefore = 5m/s vBbefore = -3m/s
vAafter = ? vBafter = 1 m/s
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Givens: mA = 10kg mB = 12kgvAbefore = 5m/s vBbefore = -3m/svAafter = ? vBafter = 1 m/s
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Givens: mA = 10kg mB = 12kgvAbefore = 5m/s vBbefore = -3m/svAafter = ? vBafter = 1 m/s
m1v1before + m2v2before = m1v1after + m2v2after
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Givens: mA = 10kg mB = 12kgvAbefore = 5m/s vBbefore = -3m/svAafter = ? vBafter = 1 m/s
m1v1before + m2v2before = m1v1after + m2v2after
10kg·5m/s + 12kg·-3m/s = 10kg v1 + 12kg·1m/s
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Givens: mA = 10kg mB = 12kgvAbefore = 5m/s vBbefore = -3m/svAafter = ? vBafter = 1 m/s
m1v1before + m2v2before = m1v1after + m2v2after
10kg·5m/s + 12kg·-3m/s = 10kg v1 + 12kg·1m/s
50kg·m/s – 36kg·m/s = 10kg v1 + 12kg·m/s
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50kg·m/s – 36kg·m/s = 10kg v1 + 12kg·m/s
14kg·m/s = 10kg v1 + 12kg·m/s-12 -12 .
2kg·m/s = 10kg v1
V1 = 0.2 m/s
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Sticky (inelastic) Collisions
Objects start separate, but end together.ex: Jumping onto a skateboard
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For sticky collisions:
pbefore = pafter
p1 + p2 = p1,2
m1v1 + m2v2 = (m1 + m2)vafter
These are interchangeable
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Lab cart A is 5kg and moving 4m/s East. Lab cart B is 10kg and moving 4m/s West. The two lab carts collide and become stuck together. What is the velocity (including direction) of the carts after the collision?
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Lab cart A is 5kg and moving 4m/s East. Lab cart B is 10kg and moving 4m/s West. The two lab carts collide and become stuck together. What is the velocity (including direction) of the carts after the collision?
Givens:
m1 = 5kg m2 = 10kgv1 = 4m/s v2 = -4m/s
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Givens:
m1 = 5kg m2 = 10kgv1 = 4m/s v2 = -4m/s
m1v1 + m2v2 = (m1 + m2)vafter
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Givens:
m1 = 5kg m2 = 10kgv1 = 4m/s v2 = -4m/s
m1v1 + m2v2 = (m1 + m2)vafter
5kg·4m/s + 10kg·-4m/s = (5kg + 10kg) vafter
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Givens:
m1 = 5kg m2 = 10kgv1 = 4m/s v2 = -4m/s
m1v1 + m2v2 = (m1 + m2)vafter
5kg·4m/s + 10kg·-4m/s = (5kg + 10kg) vafter
20kg·m/s – 40 kg·m/s = 15kg vafter
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20kg·m/s – 40 kg·m/s = 15kg vafter
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20kg·m/s – 40 kg·m/s = 15kg vafter
-20 kg·m/s = 15kg vafter
![Page 86: Momentum and Impulse Unit 6. Momentum (p) Definition- The amount of motion an object has. (vector quantity) units- kg∙m/s p = mv](https://reader036.vdocuments.site/reader036/viewer/2022081515/5697bf731a28abf838c7f13a/html5/thumbnails/86.jpg)
20kg·m/s – 40 kg·m/s = 15kg vafter
-20 kg·m/s = 15kg vafter
v = -1.33 m/s
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20kg·m/s – 40 kg·m/s = 15kg vafter
-20 kg·m/s = 15kg vafter
v = -1.33 m/s
1.33 m/s West