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Q.

If a body is released into a tunnel dug across the diameter of earth, it executes simple harmonic motion with time period

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a

T=2πReg

b

T=2π2 Reg

c

T=2πRe2g

d

T=2 seconds

answer is A.

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Detailed Solution

Time period of a body dropped from the tunnel through earth isT=2πReg
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