work done

When a force causes an object to move through a distance work is done on the

object. So a force does work on an object when the force causes a displacement of

the object.

The work done by a force on an object can be calculated using the equation:

work done = force × distance (moved along the line of action of the force)

W = Fs

work done, W, in joules, J

force, F, in newtons, N

distance, s, in metres

One joule of work is done when a force of one newton causes a displacement of

one metre.

1 joule = 1 newton-metre

You should be able to convert between newton-metres and joules.

You should be able to describe the energy transfer involved when work is done.

Work done against the frictional forces acting on an object causes a rise in the

temperature of the object.