Question

A crane lifts a load 210m to the top of a construction site. The crane used 800N of force. How many joules of work were done?

Answer 1

`W=168000\ Joule`

Step-by-step explanation:

Mechanical Work

A force is doing work if it produces a displacement in parallel to the direction of the force. The work can also be interpreted and the change in energy needed to produce the displacement. Expressed in formulas:

`W=\vec F\cdot \vec d`

If the force is parallel to the distance, the formula reduces to its scalar equivalent

W=F.d

The crane lifts a load a distance of d = 210 m by applying a force of 800 N. we compute the work as

`W=(800).(210)=168000\ Joule`

`\boxed{W=168000\ Joule}`