| A | B |
|---|
| advantage | a gain in effort or distance, or a change of direction resulting from the use of a simple machine |
| axis | an imaginary line that passes through an object or system, around which the object or system rotates |
| block and tackle | another name for a pulley system |
| class-1 lever | a lever in which the fulcrum is between the load and the effort |
| class-2 lever | a lever in which the load is between the fulcrum and the effort |
| class-3 lever | a lever in which the effort is between the fulcrum and the load |
| complex machine | a machine that is designed using a number of simple machines, often run by a motor |
| compound pulley | two or more pulleys working together |
| effort | the force applied to move a load using a simple machine |
| fixed pulley | a pulley attached in position above a load to be lifted |
| force | a push or pull |
| fulcrum | the point at which a lever arm pivots |
| inclined plane | a flat surface set at an angle, used to change the direction of a force |
| lever | a beam, free to pivot around a point |
| load | the weight or resistance that is moved using a simple machine |
| movable pulley | a pulley attached to a load that is being lifted |
| Newton | the metric unit used to measure force |
| pulley | a wheel with a grooved rim in which a rope can run to change that direction of the pull and so lift a load |
| screw | an inclined plane spiraled around an axis |
| simple machine | any of the six elementary devices that provide mechanical or other advantage |
| thread | a ridge or groove that spirals around a screw |
| wedge | a double inclined plane that tapers to a point or sharp edge, used to change the direction of force |
| wheel and axel | two wheels of different diameters attached and rotating on the same axis. |
