Question

Ritika tried to push a heavy rock of 100 kg for 200 s but could not move it. Find the work done by Ritika at the end of 20 s.

Answer 1

Answer: She did no work.

Explanation:

We know that Work done= Force*displacement

W=F*s

But here, the rock could not move. That means that displacement is 0.

So, W=F*0 =0

Therefore, work done is 0.

Work done at the end of 20 s will also be zero because the rock was not displaced.