Question

How much work does it take to raise a `19 kg` weight `15 m`?

Answer 1

`2793J`

Explanation:

Work is the vector dot product of the applied force and the displacement moved in the direction of the force.
`W=vec F * vecx`.

The lifting force overcomes the downward weight force of the object and is given by `f=mg=19xx9.8=186.2N`

Assuming it is lifted directly upwards in a straight line, the force acts in the direction of the displacement, and hence the work done is

`W=186,2*15=2793J`