A body of mass `m kg` lifted by a man to a height of one metre in `30 sec` . Another man lifted the same mass to the same height in `60 sec` . The work done by them are in the ratio.

A body of mass m kg lifted by a man to a height of one metre in 30 sec . Another mass lifted the same mass to the same height in 60 sec . The work done by then are them are in the ratio.

A body of mass m kg lifted by a man to a height of one metre in 30 sec . Another mass lifted the same mass to the same height in 60 sec . The work done by then are them are in the ratio.

A body of mass 1 kg is lifted through a height of 1m, then its work done is

A man raises a box of mass 50 kg to a height of 2 m 10 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 . Take g=10 N kg^(-1)

A body of mass 5 kg is lifted through a height of 20 m. Calculate the work done by the applied force.

A box of 50 kg is lifted by a man of mass 60 kg to a height of 50 m. Calculate the work done by the man.

A man does a given amount of work in 10 sec. Another man does the same amount of work in 20 sec. The ratio of the output power of first man to the second man is