Question

Find the work done by carrying a body of mass 4kg from a height of 60m to 80m above the ground. (Use g=10m/s^2)

Answer 1

WD= MGH
work done at the height of 60 m
=4×60×10
=2400 like this you find the answer of 18

Answer 2

g =10m/s^2
h = 20 m(final height - initial height)
m =4
work done =mgh
=4*10*20
=800 J