Question

A 10 kg boy runs up a staircase of 50 steps , each of 15 cm in height, in 5 seconds . His power is (take g= 10 m/s^2).

a)100W
b)200W
c)300W
d)400W

Answer 1

height = 50 × 15/100
= 15/2m
m = 10 kg
g = 10
work done = mgh
= 10 × 10 × 15/2
= 750j
power = 750/5
power = 150w

Hey Friend Power is 150 w but there is no option of 150

Answer 2

The answer is 150W....