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Question

A simple pendulum of length L and mass m is oscillating in a plane about a vertical line between angular limits ϕ and +ϕ . For an angular displacement θ (when |θ| < |ϕ| ), the tension in string and the velocity of the bob are T and v respectively. Then the conditions satisfied are
20481_49c08905d28e425cb0fac77e73455f8f.png

A
T=mgcosθ
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B
Tcosθ=mg
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C
Tmgcosθ=mv2L
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D
Tangential acceleration is gsinθ
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Solution

The correct options are
C Tmgcosθ=mv2L
D Tangential acceleration is gsinθ
equationintangentialdirectionisMgsinθ=Matanatan=gsinθequationinradialdirectionisTMgcosθ=Mv2r

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