Question

Chase does 10 Joules of work to push a massive rock a distance of 5 meters in 4 seconds. How much Force did chase apply to do this job? What do you do to solve this?

Answer 1

Work W = F · d (assuming the force is along the displacement). Rearranging gives F = W / d.

Plug in the numbers: F = 10 J / 5 m = 2 N.

(If you want the average power too: P = W / t = 10 J / 4 s = 2.5 W.)