| A | B |
|---|
| fulcrum | The fixed point on around which the bar of a lever is free to move. |
| machine | A device that makes work easier. |
| lever | A simple machine made up of a bar that turns, or pivots, around a fixed point. |
| pulley | A wheel around which a rope or chain is passed. |
| compound machine | A machine made up of two or more simple machines. |
| wheel and axle | A simple machine made up of two wheels that turn, or pivot, around the same point. |
| inclined plane | A simple machine with a sloping surface. |
| mechanical advantage | The number of times that a machine multiplies the EFFORT force. |
| gears | An example of a wheel and axle where the effort is applied to the smaller wheel. They transfer force. A wheels with teeth. |
| wedge | An inclined plane that moves. |
| fixed pulley | A pulley that can't change position. It doesn't change the effort force, it CHANGES the DIRECTION of the force. |
| movable pulley | A pulley that is free to move. It cuts the amount of effort force needed in half, but does NOT change the DIRECTION of the force. |
