Question

If a load of mass is raised up to a height of 15m. What is the work done on the process? (g= 10m/s2)

Answer 1

The work is done on this process equal to the changing the potential energy of the mass. Suppose, the initial potential energy was $U_0 = 0J$. The final potential energy is:

$$U = mgh$$

where $m$ is the mass of the body and $h = 15 m$ is the  height  the body was raised to.

Thus, the work will be:

$$A = U - U_0 = mgh - 0 = mgh\\ A = m\cdot 10 m/s^2\cdot 15 m = 150m\space J$$

where $m$ is mass of the body in kg.

Answer. A = 150m J.