Simple Machines

By: Sarah Bowman

Pulley

A pulley makes work easier by changing the direction of the force.


Ex: elevator

Screw

A screw is an inclined plane that is coiled around a shaft.



Ex: screwdriver

Wedge

A wedge is two inclined planes put together. It changes force from moving downwards to moving outwards.



Ex: axe going into wood

Inclined Plane

An inclined plane is a simply titled surface. Like the steeper it is, the more it will go up.



Ex: wheelchair ramp

Wheel and Axle

It's a small cylinder (axle) joined to a large cylinder (wheel).



Ex: wheel barrow

Lever

Its a rigid bar that rotates around a fixed point, the fixed point is called the fulcrum.


Ex: see saw