A block of mass 20 kg is moving on a smooth surface by pulling through a light string of tension 10√2 N. find the work done by string on the block for a displacement of 2 m along the surface.

Q: A block of mass 20 kg is moving on a smooth surface by pulling through a light string of tension 10√2 N. find the work done by string on the block for a displacement of 2 m along the surface.

(a) 10 J

(b) 20 √2 J

(c) 20 J

(d) 10√2 J

Ans: (c)