Energy and Collision

A student pushes ball X down a ramp with different speeds. In which setup will ball X hit ball Y with the LEAST amount of energy.

• 10 cm per second

• 8 cm per second

• 5 cm per second

• 1 cm per second

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Mason has a small rubber ball. How can he design a test to see how the speed of the ball moving downward affects the energy of the ball?

• Drop the ball and then throw it up in the air and measure how high the ball bounces each time.

• Drop the ball on a hard floor and on a carpet and measure which surface makes the ball bounce higher.

• Drop the ball from the same height several times and measure whether it bounces the same height each time.

• Drop the ball and then throw it down toward the floor and measure how high it bounces each time.

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Which marble had the most energy?

• marble 1

• marble 2

• marble 3

• They had the same amount of energy.

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When creating a marble roller coaster track, in order to give the marble more energy as it rolls down, you need to make the track:

• longer

• rougher

• taller

• wider

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What happens to the energy after you clap your hands?

• It's stored in your muscles.

• It's destroyed because your hands stop moving.

• It's all used up, because your hands stop moving.

• The energy is changed into heat and sound.

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Friction during a collision causes some kinetic energy to be changed into _____.

• heat

• electricity

• potential energy

• chemical energy

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Which describes a change that will likely occur in the collision above?

• Kinetic energy will be transferred from the nail to the hammer, causing the hammer to move.

• Kinetic energy will be transferred from the hammer to the nail, causing the nail to move.

• Potential energy will be transferred from the nail to the hammer, causing no change in motion.

• All of the kinetic energy will transform into light energy and no change in motion will occur.

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Which is not an example of a collision causing energy transfer and change in motion?

• a bat strikes a baseball

• a catcher catches a baseball

• a baseball hits the ground

• a baseball flies through the air

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………………is transformed or transferred; it cannot be made or destroyed.

• Energy

• momentum

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In elastic collisions, _____________

• some of the energy of motion is lost as sound and heat

• all the energy of motion is transformed, but not transferred

• energy is not conserved in the system

• there is no loss of energy of motion from the system

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