Levers are a solid bar that rotates, or turns on a fulcrum.
Class 1, 2, & 3
Ex. C1- hammer C2- stapler C3- tweezers
MA= effort arm divided by load arm
A wheel and axle is a wheel attached to a shaft or axle.
Ex. A wheel on a car.
MA= wheel radius divided by axle radius
A screw is an inclined plane wrapped around a cylinder, used to raise and lower weights as well as to fasten objects.
Ex. Phillip's head screw
MA= diameter of screw divided by lead of screw thread.
An inclined plane is a simple machine that is a sloping surface, such as a ramp.
MA= length of incline divided by height of incline.
A wedge is simple machine that has a thick end and a thin end.
Ex. Door stopper.
MA= side length divided by thickness
A pulley is a wheel with a grooved rim that turns on an axle.
Ex. flag pole
MA= two * number of pulleys