Create an account
any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks.
wheel and axle
hoist so arranged that a rope unwinding from a wheel is wound onto a cylindrical drum or shaft coaxial with the wheel.
something solid that is usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them.
a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope.
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 and try again
Reload the page to try again!Reload
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