Question

A box with a mass of 7 kilograms is pushed up a ramp to a height of 5 meters. What is the work done against the force of gravity?

Answer 1

The potential energy of the box when it gets to the top is

                  (mass) (gravity) (height)

             =    (7 kg) (9.8 m/s²) (5 m)

             =          343 joules.

That's the work done against the force of gravity.  Any
additional work is done against the force of friction.