Question

How much work does it take to raise a `5 kg` weight `14 m`?

Answer 1

Work is the amount of energy required to move an object using force (in this case to overcome gravity) through a distance (in this case 14 m).

Explanation:

The force of gravity is equal to the mass of the object times the acceleration of gravity `(g = 9.81 m/(s^2))`.

If we use SI units for everything, the answer will also come out in SI units of energy (joules):

`w = m times g times d = 5 kg times 9.81 m/(s^2) times 14 m = 687 J`