Question

If you exert a force of 10.0 N to lift a box a distance of 0.9 m, how much work do you do?

Answer 1

\[Work done = F . dr \]

Here F and dr are vectors

For your case, F and dr are in the same direction, hence the dot product results in simply

WD= Fdr

where F and dr are the magnitudes of force and displacement.

WD = 10 x 0.9 = 9 Nm