The bob in a simple pendulum of length ℓ is released at t=0 from the position of small angular displacement θ. Linear displacement of the bob at any time t from the mean position is given by
ℓθcos√glt
ℓ√gltcosθ
ℓgsinθ
ℓθsin√glt
A
ℓ√gltcosθ
B
ℓθsin√glt
C
ℓθcos√glt
D
ℓgsinθ
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Solution
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x=lcoswt
=l√gLtcosθ
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