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Questions  

A simple pendulum with length L and mass m of the bob is oscillating with an  amplitude A. The maximum tension in the string is

a
mg
b
mg1+AL2
c
mg1+A2L2
d
mg1+AL2

detailed solution

Correct option is B

T−mgcos⁡θ=mv2LT is maximum when θ=0,Tmax−mg=mvmax2LTmax=mg+mω2A2L=mg+mgA2L2∵ω2=gLTmax=mg1+A2L2

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