A block of mass 1 kg is projected with initial velocity (v_0) of 10 m/s on a rough inclined surface. The block moves up and comes back to its initial position and stops. Find work done by the friction on the block.

Q: A block of mass 1 kg is projected with initial velocity (v0) of 10 m/s on a rough inclined surface. The block moves up and comes back to its initial position and stops. Find work done by the friction on the block.

Numerical

(a) Zero

(b) -50 J

(c) -100 J

(d) 50 J

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Ans: (b)