Question

Boy runs up a staircase of 55 steps in 11 sec. height of each step is 20 cm. his weight is 50 kg .(g=10m/s^2). Calculate::: work done by boy and power of boy.

Answer 1

M=50kg
H=20*55=1100
g=10m/s^2
t=11sec

P=w/t
P=m*g*h/t
=50*10*1100/11=50000/100w
Work done =50*10*1100=550000/100j