A boy of mass 40 kgruns up a flight of 50 steps,each of 10 cm high, in 5s, Find the power developed by the boy,

A boy of mass 40 kg climbs up a flight of 30 steps each 20 cm high in 2 min and a girl of mass 30 kg does the same in 1.5 min. Compare : (i) the work done, and (ii) the power developed by them (g = 10 m s^(-2) )

A boy of mass 55kg rus up a filight of 40 stairs, each measuring 0.15m Calculate the work done by the boy.

A boy ''A'' of mass 50kg climbs up a stair case in 10s. Another boy ''B'' of mass 60kg climbs up a same staircase in 15s. The ratio of their power developed by the boys ''A'' and ''B'' is

A man of mass 50 kg clikmbs up 20 steps of a staircase in 5s . Each step is 30 cm high. Find the power applied by the man .

A boy of mass 50 kg runs up to a stair case of 45 steps in 9 s. If the height of a 15 cm, find his power.

A boy of mass 40 kg climbs a staircase of 30 steps, each of 0.2 m height, in 30 s. Calculate power. (g=9.8ms^(-2))