Unit 2 Energy

What factors determine an object’s kinetic energy?

• its height and its mass

• its mass and its speed

• its size and its weight

• its speed and its height

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Which of these is an example of kinetic energy?

• wind blowing

• water in a glass

• a can of vegetables

• the walls of a building

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When would you have the most potential energy?

• walking up the hill

• running up the hill

• sitting at the top of the hill

• sitting at the bottom of the hill

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Which of the following is an example of the transformation of potential energy into kinetic energy?

• A car stopping at a stop sign.

• A balloon stays still in the air.

• An orange falling from a tree.

• A roller coaster going up a hill.

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Which statement about energy transformations is not true?

• All forms of energy can be transformed into thermal energy.

• Energy is never destroyed or created during transformations.

• Potential chemical energy always transforms into kinetic energy.

• Some thermal energy is always released during a transformation

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At which point does the pendulum weight have the greatest amount of kinetic energy?

• A

• B

• C

• D

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A coffee mug falls off of the kitchen countertop. At what point is the potential energy the

greatest?

• At the start of the fall (the top)

• Halfway between the start and the end

• At the end of the fall (the bottom)

• At all points during the fall

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Jordan wants to know how much kinetic energy a 9 lb. bowling ball has when it is dropped.

What additional information would Jordan most likely need to determine the kinetic energy of the bowling ball?

• The speed at which it fell

• The height from which it was dropped

• The number of times the bowling ball was dropped before

• The force of gravity that is pulling down on the bowling ball and its mass

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The table gives information about two balls dropped from different windows. Which statement correctly compares the balls when they reach the ground?

• Ball A has greater potential energy

• Ball B has greater kinetic energy.

• Both balls have the same amount of potential energy.

• Both balls have the same amount of kinetic energy

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What is energy?

• The ability to cause change or do work

• The ability to create light

• Gravitational forces

• A hypothesis that is proven in an experiment

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