A particle of mass 2 kg moves in simple harmonic motion and its potential energy U varies with position x as shown in the figure. The period of oscillation of the particle is

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2π5 s

22 π5 s

2 π5 s

4π5 s

answer is D.

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Detailed Solution

∵ 12kA2=1 J∴ k=2A2=2(0.4)2=252Nm-1∴ T=2πmk=2π2(25/2)=4π5 s

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