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Question

The phase difference between the displacement and acceleration of particle executing S.H.M. radian is:

A
π/4
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B
π/2
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C
π
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D
2π
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Solution

The correct option is B π
vasin(ωt+ϕ)
Differentiating
v=aωcos(ωt+ϕ)
Differentiating again,
a=aω2sin(ω+ϕ)
Now taking minus sign
a=aω2sin(ωt+ϕ+π)
So, phase difference between displacement and acceleration will be:-
=ωt+ϕ+πωt+ϕ=ωt+ϕ+πωtϕ=π

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