who wants to be a millionaire?
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Who Wants to Be a Millionaire?. Essays. Click the appropriate dollar amount at right to proceed to the question. _________________________ _____________________ _____________________ _____________________ ___________________ ___________________ __________________ _________________ - PowerPoint PPT PresentationTRANSCRIPT
Template by Bill Arcuri, WCSD
Who Wants to Be a
Millionaire?
Template by Bill Arcuri, WCSD
Machines
_________________________ _____________________ _____________________ _____________________ ___________________ ___________________ __________________ _________________ _________________ _________________ _________________ ______________ ______________ ______________ ______________
Click the appropriate dollar amount at right to proceed to the question
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Phone A Friend
“OK Contestant…Please select a friend to help you with this one. You have thirty seconds to discuss your options…”
Return to the Question
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Ask the Audience
“Audience, we need your help on this one…in a moment, we’ll ask you to indicate, by show of hands, your choice for the correct answer…”
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Fifty - Fifty
You’ve asked that two of the wrong answers be eliminated, leaving you with one wrong answer plus the correct one.
50/50
Return to the Question
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Correct
Correct!
Proceed to Next Question
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Incorrect
Sorry, That’s Incorrect
Return to the Question
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160
Dan and Paul push a box 4 meters with a force of 40 Newtons. How much work did they do?
100 1000
1600
50/50
A
C D
B
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Some comes from other places
The amount of work a machine does is less than the amount of work put into it. Why?
Some changes the temperature
Some is lost to friction
Some goes into the airA
C D
B
50/50
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load
The support in a lever is called the ______________.
fulcrum central joint
effort forceA
C D
B
50/50
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Hugging a tree trunk
Which of the following is an example of work?
Pulling weeds out of a garden
Pushing on a wall with your hands
Pushing your feet on a wallA
C D
B
50/50
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No work is done here
A jar has two lids that are the same size. You can put one lid on by slamming down hard on it with your fist. The other lid is a screw-top lid that turns on. Which statement below is true?
First lid takes more work
Second lid takes more work
Both require the same workA
C D
B
50/50
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brick
Which of the following is a simple machine?
bread machine salad tongs
computerA
C D
B
50/50
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lever
A screw is a modified _______.
inclined plane wheel and axle
wedgeA
C D
B
50/50
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Fourth-class
Which kind of lever has the fulcrum in the middle?
Third-class Second-class
First-classA
C D
B
50/50
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fixed pulley
What type of pulley has many pulleys with one rope like the one we made in class?
moveable pulley
block and tackle pulley
reversible pulleyA
C D
B
50/50
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Changes the direction of force
How does a fixed pulley make work easier?
Doubles the movement of the
load
Increases the distance of applied
force
Reduces the effort forceA
C D
B
50/50
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lever
On a sailboat, the triangular jibsail acts as a(n) __________.
pulley wheel and axle
inclined planeA
C D
B
50/50
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wedge
A baseball bat is a type of simple machine. Which of the following BEST describes the baseball bat?
inclined plane third-class lever
first-class leverA
C D
B
50/50
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wheel and axle
On a sailboat, a winch cranks rope in and out. What kind of simple machine is a winch crank?
screw wedge
leverA
C D
B
50/50
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Less work is done
In a lever what happens if the fulcrum is close to the load?
More work is done
More force is needed
Less force is neededA
C D
B
50/50
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shovel
Which of the following simple tools is most closely related to an inclined plane?
flagpole wheelbarrow
crowbarA
C D
B
50/50
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screw
A child uses two inclined planes joined together at an angle to push through sand. This machine is a __________.
compound machine wedge
rampA
C D
B
50/50
Essays:1)People who design machines try to reduce the friction between the machine’s parts. Explain why they do this and identify two ways you can reduce friction in machines.2)In a wheel and axle simple machine, why is it important that the diameter of the wheel be greater than the diameter of the axle?3)Identify a compound machine you use in your life. Identify at least two simple machines that are in the compound machine.4)Explain how the formula for work relates to the scientific definition of work.5)Simple machines make work easier
1)Name two simple machines and how they make work easier2)Provide two examples of each type of simple machine.