Work, Power and EnergyHard
Question
system is placed on a rough horizontal surface having coefficient of frictional μ. The spring initial elongation 
and the block is released from rest. rest For the subsequent motion
and the block is released from rest. rest For the subsequent motionOptions
A.Initial acceleration of block is 2μg.
B.Maximum compression in spring is 
C.Minimum compression in spring is zero
D.maximum speed of the block is 
Solution
For (A) : initial acceleration = 
For (B, C) :
Therefore maximum compression =
and minimum compression = 0
For (D) : At maximum speed Fnet = 0 so by using work energy theorem
mv2 = 
k 
⇒ v = 2μg
For (B, C) :
Therefore maximum compression =
and minimum compression = 0For (D) : At maximum speed Fnet = 0 so by using work energy theorem
mv2 = k ⇒ v = 2μgCreate a free account to view solution
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