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Physics

General

Easy

Question

The Gravitational P.E of a body of mas m at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

-2mgRe
2mgRe
$\frac{1}{2}$ mgRe
- $- \frac{1}{2} m g$ Re

The correct answer is: - $negative 1 half m g$ Re

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For this question, we should know the rules of dot product.

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