Question

A man weighing 50kg runs up a hill raising himself vertically 10 m in 20 secs . Calculate the power

Answer 1

power =work done / time taken

work done = mgh

p = 50*10*10/20

=5000/20

p=250W

Answer 2

m=50 kg

h=10 m

t=20 sec

g=10 $m/s^{2}$

Power=mgh/t

          =50*10*10/20

          =5000/20

          =250 W