Physics - Unit #1 Lesson 7.2

An object may store energy by virtue of its position.

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The amount of gravitational potential energy possessed by an elevated object is equal to the work done against gravity in lifting it.

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No force is done in moving the ball horizontally when friction is present.

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No force is done in moving the ball horizontally if we ignore friction.

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Potential energy, gravitational or otherwise, has significance only when it changes - when it does work or transform into energy of some other form.

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The potential energy of the ball or any object is not relative to some reference level.

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The potential energy of the ball or any object is relative to some reference level.

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Only changes in potential energy are meaningful.

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One of the kinds of energy into which potential energy can change is energy of motion, or kinetic energy.

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The only one kind of energy into which potential energy can change is energy of transformation.

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