Question
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
Answers
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
h = 20•0.1 = 2 m
The work is W = mgh =350•2 = 700 J
Power = Work/time = 700/10 =70 W
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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
133.33 W
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
M=350N, G=10ms-1, H=10CM, T=10 seconds.
350×10×10/10
=3500W
75 wats
Godswill show workings
Godspower pls show ur workings
Why didn't u guys add gravity which is 10