a boy weighing 350N runs up a flight of stairs consisting of 20 steps each 10cm high in 10 seconds. What is his power? show your workings

The height is

h = 20•0.1 = 2 m
The work is W = mgh =350•2 = 700 J
Power = Work/time = 700/10 =70 W

a person with a mass of 40 kg runs up a flight of stairs in 12 seconds the flight has 20 steps and the height of each step is 20cm

A 40kilowatt electric cable ??$ used to transmit electricity through a resistor of resistance 2ohms at 800 volts, the power loss at energy is? Pls show workings

Godswill show workings

Why didn't u guys add gravity which is 10

A generator ??$ on daily use in the process 106kw ????? 540w tungsten box are on force the same time interval. Thee energy consumed is

75 wats

Godspower pls show ur workings

13.33 W

MGH/T means mass × acc due to gravity × hight

M=350N, G=10ms-1, H=10CM, T=10 seconds.
350×10×10/10
=3500W