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Q.

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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a

2π5 s

b

22 π5 s

c

2 π5 s

d

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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