A simple pendulum is swinging in a vertical plane. The ratio of its potential energies when it is making angles300 and 600 with the vertical is,

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1:(2 -√3)

(2 -√3):1

1 : 2

2 : 1

answer is B.

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Detailed Solution

h = l - l cosθP.E = mgh =mgl (1 - cos θ)PE1PE2=mgl1- cos300mgl1-cos600=1-3212=2-3

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