Physics

Confusing Work and Power

Students use work and power interchangeably and treat joules and watts as if they measure the same thing.

Quick check

Why students make it

Both ideas involve force, distance, and energy, so students often focus only on how hard the task feels. They forget that power also depends on time.

The rule done right

Work is energy transferred by a force through a distance, so W=FdW = Fd when the force is in the direction of motion. Power is the rate of doing work, so P=WtP = \frac{W}{t}.

Related resources

workpowerenergy