Solve for questi
Dear student
Let M be the mass of the man. So, net work done by him is,
W = mass raised X acc. due to gravity X height
=> W = (50 + M) X 9.8 X 40
Power = Work done/time taken
=> 1568 = [(50 + M) X 9.8 X 40]/25
=> M = (1568 X 25)/(9.8 X 40) – 50
=> M = 50 kg
Regards