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A tunnel has been dug through the centre of the earth and a ball is released in it. It will reach the other end of the tunnel after
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a
84.6 minutes
b
42.3 minutes
c
1 day
d
Will not reach the other end
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Correct option is B
Ball execute S.H.M. inside the tunnel with time period T=2πRg=84.63 minHence time to reach the ball from one end to the other end of the tunnel t=84.632=42.3 min.Similar Questions
If a hole is bored along the diameter of the earth and a stone is dropped into hole
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