Physics B Final

A push or pull is called

• motion

• force

• acceleration

• inertia

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Forces that are equal in size and opposite in direction are

• balanced forces

• Unbalanced Forces

• Net Force

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You are riding on a skateboard when the board suddenly stops. Why does your body fly forwards?

• Someone Pushed You.

• Inertia keeps you moving forward

• A net force pushed you off the skateboard

You collect leaves and put them in a bag. How do you move them faster?

• Pull the bag with more force

• Put Rocks in the bag

• Let someone else deal with the problem

What causes objects to slow down?

• friction

• gravity

• normal force

• weight

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An unbalanced force will cause an object to

• have constant speed

• no motion

• come to a stop

• accelerate

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A 2,000 kg truck and a 500 kg car are racing. The same amount of force is applied to each of them. What will happen?

• The truck accelerates 4 times faster

• The car accelerates 4 times faster

• The car accelerates 2 times faster

• The truck accelerates 2 times faster

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When you know the speed and direction of an object you know the objects:

• vector

• speed

• distance

• acceleration

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According to Newton's third law of motion when a hammer strikes a nail, the nail

• creates friction on the hammer

• exerts an equal force back on the hammer

• disappears

• moves at a constant speed

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What types of force is present when a guitar is played

• friction

• magnetic

• gravitational

• tension