Q.
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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a
4 m/s
b
22 m/s
c
2 m/s
d
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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