Six Simple Machines
A wheel with a grooved rim in which a rope can run and
so change the direction of a pull. It is a simple machine that is used to raise weights.
A piece of wood or metal tapering to a thin edge, used
in splitting or separating.
Wheel and Axle
Axle on which a wheel is fastened, used to lift weights
by winding a rope onto the axle as the wheel is turned.
A bar which turns on a fixed
support called a fulcrum and is used to transmit effort and motion.
3 Classes of Levers
Plank or other plane surface set at an acute angle to a
A cylinder with an inclined plane wrapped around it and
fitting into a threaded cylindrical hole. Screws are used in jacks to lift heavy loads.