one of the basic machines that make up other machines
a simple machine made up of a bar that turns on a fixed point
the fixed point, or point that does not move, on a lever
the force put on one part of a simple machine, for example, when you push or pull on a lever
that which is done on an object when a force moves moves an object through a distance
a simple machine made up of a rope or chain and a wheel around which the rope or chain fits
wheel and axle
a simple machine made up of a large wheel attached to a smaller wheel or rod
a flat surface with one end higher than the other
how well a machine changes effort into useful work
an inclined plane wrapped around a pole
a machine made of two inclined planes placed back-to-back
a change of position
frame of reference
the things around you that you can sense and use to describe motion
a measure of an object's change in position during a unit of time; for example, 10 meters per second
the metric, or System International(SI) unit of force
a change in the speed or direction of an object's motion
a force that pulls all objects towards each other
a measure of the force of gravity upon an object
a force that keeps objects that are touching each other from sliding past each other easily
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions 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.
Your microphone is muted
For help fixing this issue, see this FAQ.