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Course: Middle school physics - NGSS > Unit 3

Lesson 3: Changes in energy

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Understand: changes in energy

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A large cargo container gains gravitational potential energy because it is lifted at a constant speed by a crane.

Why does the gravitational potential energy of the cargo increase?

(Choice A)
A force was applied to the cargo, increasing its height above the ground.
(Choice B)
A force was removed from the cargo causing it to move at constant speed.
(Choice C)
A force was removed from the cargo, increasing its height above the ground.
(Choice D)
A force was applied to the cargo causing it to move at constant speed.