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Newton's Law of Gravitation

If the univer...

Question

If the universal gravitational constant was time dependent, then which of the following quantities would be conserved?

A

Potential energy

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B

Kinetic energy

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C

Linear momentum

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D

Angular momentum

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Solution

The correct option is A Potential energy
$P . E = \frac{G M m}{R}$
If $G = G (t)$ [Time dependent]
$∴ P . E$ will be conserved.

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