A man can lift a block of mass of 50 kg up to a height of 2 m in 2 seconds. Calculate the power developed by the man to lift the block.
The average power required to lift a 100 kg mass through a height of 50 metres in approximately 50 seconds would be
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.