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Question

For given Fx graph, A body of mass 5kg moving with a velocity of 8m/s hits the spring. Calculate the force constant of the spring and also the compression produced in the spring when body hits it.
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Solution

F=kx

k=Fx=slope

k=80.1=80N/m

The block will continue to compress till the block comes to rest.

From conservation of energy-

U2+K2=U1+K1

12kx2+0=0+12mv2

x=vmk

x=2m


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