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Olympiad workbookNSEPGravitation

The figure shows a smooth tunnel AB ( length =2 ) in a uniform density planet (say Earth) of mass M and radius R . A small ball of mass m is released from rest at the end A of the tunnel. Acceleration due to gravity at surface of the planet is g . Time taken by the ball to reach the end B is

Options

AR g
B2 g
C2 2 R g
D2 R g

Correct answer

A. R g

Step-by-step solution

No Solution

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