Energy Basics

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What is energy?

Back

Energy is the ability to do work or cause change.

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What happens to energy when a tennis ball collides with a racquet?

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The energy is transferred from the racquet to the ball, giving it motion.

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Which has more energy: a small limb or a big limb falling from a height?

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The big limb has more energy because it has more mass.

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Where does the energy go when you toss a rock into a pond?

Back

The energy goes into the water, creating ripples.

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How does a rock gain energy of motion?

Back

A rock gains energy of motion when it is thrown, transferring energy from your arm.

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What does it mean that energy is conserved?

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It means that the total amount of energy remains the same, even when it transfers between objects.

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What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion.

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What is potential energy?

Back

Potential energy is stored energy based on an object's position or condition.

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Front

Give an example of potential energy.

Back

A rock at the top of a hill has potential energy due to its height.

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What happens to energy when you turn on a light bulb?

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Electrical energy is converted into light and heat energy.