A block of mass m attached to a spring of spring constant k oscillates on a smooth horizontal table. The other end of the spring is fixed to a wall. The block has a speed v when the spring is at its natural length. Before coming to an instantaneous rest, if the block moves a distance x from the Mean position, then
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Kinetic energy of block 
= Elastic potential energy of spring 
By solving we get 
.
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