A block of mass 2kg is released from A on the track that is one quadrant of a circle of radius 1m. It slides down the track and reaches B with a speed of 
and finally stops at C at a distance of 3m from B. The work done against the force of friction is
Text Solution
Verified by ExpertsThe correct answer is:
B
: Block possess potential energy at point A = mgh
Finally block stops at point C. So its total energy goes against friction i.e. work done against friction is 20 J.
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