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Q.

In the figure shown, pulley and spring are ideal. If k is spring constant of spring, the potential energy stored in it is m1>m2

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a

2m22g2k

b

12m1-m22g2k

c

2m12g2k

d

m1+m22g2k

answer is A.

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Detailed Solution

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T=m1g

kx=2T=2m1g

x=2m1gk

Energy stored=12kx2=12k 4m21g2k2=2m21g2k

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