A sphere of mass 2 kg is moving on a frictionless horizontal table with velocity v. It strike with a spring of constant 1 N/m and compresses it by 4 m. The velocity (v) of the sphere is :

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4 m/s

22 m/s

2 m/s

answer is B.

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Detailed Solution

As per work energy theorem wsp=ΔK.E⇒12Kx2=12mv2⇒v=Kmx=12.4=22 m/s

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