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Q.

A body moves along a straight line OAB simple harmonically. It has zero velocity at the points A and B which are at distances a and b respectively from O and has velocity v when half way between them. Find the period of SHM.

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a

π(b+a)v

b

π(b-a)v

c

b-aπv

d

2(b-a)v

answer is A.

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Detailed Solution

Question Image

It is clear from the figure that C is the mean position of SHM. The amplitude of oscillation 

A=b-a2

The velocity of mean position will be

v=ωA=2πTb-a2 T=π(b-a)v

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