Power: how quickly?

Energy is an amount. Power is a rate.

POWER = ENERGY ÷ TIME

Power is measured in watts (W).

1 W = 1 joule each second.

A motor transfers 180 J in 30 s.

Power = 180 ÷ 30 = 6 W.

ENERGY = POWER × TIME

At 6 W for 50 s: energy = 300 J.

A higher power means faster energy transfer.