A weightlifter lifted a load of 200 kgf to a height of 2.5m in 5s .Calculate :
1-the work done
2-the power developed by him
Take g=10N 1/kg
A man raises a box of mass 50 kg to a height of 2 m in 20 s, while another man raises the same box to the same height in 50 s.
(a) Compare:(i) the work done,and (ii) the power developed by them.
(b) Calculate:(i) the work done,and (ii) the power developed by each man.Take g=10 N kg−1.