| A | B |
|---|
| simple machine | a machine with few or no moving parts |
| work | when a force moves an object |
| compound machine | two or more simple machines put together |
| lever | a simple machine made of a board or bar and a fulcrum, used to lift things |
| inclined plane | a surface set at an angle, connects a lower place to a higher place |
| wedge | two inclined planes put together |
| screw | an inclined plane wrapped around a post |
| wheel and axle | a wheel that turns on a post |
| pulley | a rope wound around a reel used to lift things to a higher place |
| fulcrum | the point on which a lever rests |
| machine | a tool that changes either the mount of force or the direction of the force to make work easier |
| see-saw | a lever used as playground equipment |
| ramp | a common type of inclined plane |
| load | the item to be lifted by a lever |
| force | the push on the end of the lever to raise the load |
| drill | a type of screw used to make holes |
| nut and bolt | a type of screw used to hold things together |
| knife blade, ax and hatchet blades | examples of wedge |
| fishing reel, door knob | examples of wheel and axle |
| flagpole, draw drapes | example of pulley |
