Question

A man raises a box of 50 kg mass to a height of 2 m in 1 20 seconds while another man raises the same box to the same height in 5 minutes compare 1 the work done 2 power delivered by them​

Answer 1

Answer:

1) Work done = 50×10×2=1000J

2) Power developed by first man= 1000÷20 = 50W

Power developed by second man= 1000÷50=20W

Answer 2

SOLUTION
where, is the force applied, is the displacement, and is the angle between the force applied and displacement

Hence, work done is independent of time taken.

In the given cases, as the force applied are in the same direction. Also,
So

In both the cases, mass and displacement are the same.


Hence work done is in the ratio of 1000:1000 = 1:1