For each pair of terms, explain the difference in their meanings.

joule/watt

work output/work input

mechanical efficiency/mechanical advantage

screw/inclined plane

simple machine/compound machine

the SI unit of power, equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere.the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one meter in the direction of action of the force, equivalent to one 3600th of a watt-hour.- joule