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Question

A particle performs SHM with period T and amplitude A. The mean velocity of the particle averaged over quarter oscillation, starting from right extreme position is

A
0
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B
2AT
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C
4AT
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D
3AT
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Solution

The correct option is C 4AT
Let the displacement of the particle executing SHM at any instant is x=Asinwt
Velocity v=dxdt=ddt(Asinwt)=Awcoswt
The mean velocity of the particle average over quarter oscillation is
v0T/4=T/40vdtT/40dt=T/40AwcosdtT/4
=Aww[sinwt]T/40T/4
=A[sinwt]T/40T/4
=4AT

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