Question

a colie lifts a box of 15kg from the ground to a height of 2.0m . calculate the work done by the coolie on the box . (g=9.8m/s2)

Answer 1

as the coolie picks the box so he does work against the  force of gravity,

so, work done=mass*acceleration due to gravity*height

--->work done=15*2*9.8

--->work done=294J