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The amount of power required to do 1 joule of work in 1 second.


The transfer of energy to an object by a force that causes the object to move in the direction of the force


The quantity that measures the rate at which work is done


Nm is a derived unit that is equivalent to this

Joule/second (J/s)

A Watt is equivalent to this derived unit

Work = Force x distance (W =Fd)

Formula for Work

James Watt

The unit for power was named after a Scottish inventor who played an important role in the development of the steam engine

Input force

The type of force put into a machine to make it work; usually spread out over a large distance

Mechanical Advantage

A ratio of the output force and the input force

Output force

The type of force a machine applies to accomplish a task

James Prescott Joule

The unit of work was named after this English physicist

- Joule
- Newton meter
- kilogram times meter squared per
second squared

The units of work include...


A device that can multiply and change the direction of an input force.

- Watt
- Joule per second

Units for power

Work; joules

What is done when a force makes an object move? The units are _____.

Mechanical advantage; None

The amount that a machine multiplies force or distance. The units are _____.

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