A block of mass 0.18 kg is attached to a spring of force constant 
. The coefficient of friction between the block and the floor is 0.1. Initially the block is at rest and the spring is unstretched. An impulse is given to the block. The block covers a distance of 0.66 m and comes to rest for the first time. Then, the initial velocity of the block is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Here, 
,
According to conservation of mechanical energy principle, we know
Decrease in mechanical energy = work done against friction
Substituting the values of 
, we get
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