Advertisement Upgrade to remove ads


an inclined plane that moves

wheel and axle

two circular objects of different sizes that are attached so that they rotate together


an inclined plane wrapped around a cylinder


pivot point of a lever

inclined plane

a flat, sloped surface


when a force produces motion in the direction of the force


the rate at which work is done

mechanical advantage

the output force divided by the input force


any rigid rod or plank that pivots about a point


a grooved wheel with a rope or chain that changes the direction of the force

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording