| A | B |
|---|
| Simple Machines | basic machines that make up other machines, they always change the size or direction of a force |
| Lever | bar that turns around a fixed point |
| fulcrum | fixed point of a lever |
| effort force | force you put into a simple machine |
| work | result of a force moving an object through a distance |
| pulley | rope or chain and the wheel it fits around |
| fixed pulley | pulley that changes the direction of the effort force |
| wheel and axel | large wheel attached to a smaller wheel or rod, it increases the effort force |
| inclined plane | flat surface that has one end higher than the other |
| efficiency | how well a machine changes effort into work |
| screw | inclined plane wrapped around a pole |
| wedge | two inclined planes place back to back, the resulting force pushes things apart |
| How is a screw related to an inclined plane? | both move objects through a distance while going up a ramp |
| How does a seesaw do work? | Each person is using force to lift the other person through a distance, the people are doing work while playing it. |
| spring scale | tool to measure effort force |
