Question

A man raises a box of mass 50 kg to a height of 2m in 20 seconds, while another man raises the same box to the same height in 50 seconds. Compare the work done​

Answer 1

Work done in both the cases will be same

Because the work done in either of the cases will be , increase in the potential energy

And we know that potential energy do not depend on time.

Work done = m× g × h

= 50 × 2 × 9.8

= 980 J

Answer 2

Explanation:

work done by both is same.

work done = force ×displacement

It doesn't depend on how much time they took to lift the object.

W1=F×h

=mgh

=50×10×2

=1000j

W2=mgh

=1000j