JEE Main Physics question

PhysicsGravitationJEE Main

The period of the moon's rotation around the earth is nearly days. If the moon's mass were times its present value and all other things remained unchanged, the period of the moon's rotation would be nearly [Kerala (Engg.) 2002]

Answer: (D)

Solution

Kepler's third law, , is derived by treating the orbiting body's own mass as negligible compared to the central mass, so

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Question ID VK-154720