The bob of simple pendulum having length /, is displaced from mean position to an angular position θ with respect to vertical. If it is released, then velocity of bob at equilibrium position
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a
2gl(1−cosθ)
b
2gl(1+cosθ)
c
2glcosθ
d
2gl
answer is A.
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Detailed Solution
Using energy conservation mgl(1−cosθ)=12mv2v=2gl(1−cosθ)