Work is done when a force pushes something through a distance.
Try this
5
work W = F · d (F = 50 N) = 250
Work
Only the component of force along the displacement does work. Push perpendicular to the motion and W = 0; measured in joules (J).
Your turn
You lift a 10 kg box 2 m straight up (g ≈ 9.8). How much work do you do against gravity?
Work done on an object equals the change in its kinetic energy — that's the work–energy theorem, W = ΔKE.
Work
Hold a heavy book still — your arm gets tired, but you do zero physics-work because nothing moves.