What he said ^^^. But I'll explain it differently and give other examples to make it more applicable to real life
Strength is force developed without respect for time/speed, for example you might be able to lift a very heavy weight or push a car that weights well over a ton, but you wont be able to do it very quickly.
Power is force developed in the minimum amount of time, to throw a kick or punch or pitch a base ball requires less force than lifting a heavy weight or pushing a car, but the force has to be produced in a split second.