How much work does it take to raise a #26# #kg # weight #3# #m #?
There are (at least) two ways to answer this question. Both are included below. The answer, using either method, is
Work = force times distance
The force of gravity on a mass
Combining these equations:
The work done is equal to the change in gravitational potential energy:
Both methods end up involving the same calculation and yield the same answer.