Our physics expert picks his top-five equations, plus a scheme to supply US power needs with a bucket of baseballs. Thanks, ...

is the rate at which energy is transferred or work is done. It has units of watts (W) or joules per second (J/s). The more energy that is transferred per second, or the more work that is done per ...

Work done = 10 × 2 = 20 J The triangle above will help you to rearrange the equation. Work done has the same units as energy - joules. This is because energy is the ability to do work.