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Question

A particle is executing SHM on a straight line with zero initial phase. It crosses the point from where the time is considered for the motion at successive intervals t and 2t with a speed v. Find the amplitude of the motion:


A

2vt

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B

vt

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C

vtπ

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D

vt2π

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Solution

The correct option is C

vtπ


Initial phase ϕ=0

Thus the point from where time is considered, is origin.

T=(tOA+tAO)+(tOB+tBO)

=t+t=2t=2πω

ω=πt

x=a sinωt=a sin π=0

v=aω cosωt=aω=aπt

Amplitude = |a|=vtπ


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