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Question: if ep is gravitational potential energy of an object at...

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If Ep is gravitational potential energy of an object at height h, write down which one of the following is true:

(A) g is always positive

(B) Ep is always positive if h increases

(C) g is negative for a falling object

(D) Ep is always defined as zero at the Earth’s surface

(E) g is constant everywhere in the universe

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