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Question

A particle executes SHM of period π and amplitude 2cm. Find the acceleration of particle when it is 1 cm from mean position.


A

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B

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C

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D

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Solution

The correct option is B


x=A sin(ω t+ϕ0) is the general eqn for SHM here A=2cm

T=π s, ω=ω=2πT=2s7

x=2 sin(2t+ϕ0).....(1)

v=dxdt=4 cos(2t+ϕ0)....(2)

v=d2xdt2=8 sin(2t+ϕ0)....(3)

Given that x=1cm,from(1)sin(2t+ϕ0)=12

from (3) a=8×12=4ms1.


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