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The potential energy of a particle of mass I kg in motion along the x-axis is given by: U = 4(1-cos2x), where x is in metres. The period of small oscillation (in sec) is

a
b
π
c
π2
d
π4

detailed solution

Correct option is C

F = -dUdx = -8 sin 2xFor small oscillations,sin 2x = 2xi.e., a = -16xSince a = -xthe oscillations are SH in natureT =2π|xa| = 2π116 = π2sec

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