Question

a man of 60 kg run up of flight of stairs 3m high in 2 second calculate the average power

Answer 1

w = mgh = 60 * 10 * 3 = 1800J

t = time = 2s

Pav = w/t = 1800/2 =900w

Answer 2

Answer:

it is very easy

Explanation:

power =work /time

work=f.s

f=ma

m=60kg,a is 9.8 m/s2

s is 3 m

so work is 60×9.8×3=1764

power is eual to 1764/2

882joules