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Assume the earth to be perfect sphere of...

Assume the earth to be perfect sphere of uniform density. If a body is dropped at one end of a tunnel dug along a diameter of the earth (remember that inside the tunnel the force on the body is – k times the displacement from the centre, k being a constant), it (body) will

A

reach the earth's centre and stay there

B

go through the tunnel and comes out at the other end

C

oscillate simple harmonically in the tunnel

D

stay somewhere between the earth's centre and one of the ends of tunnel .

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