| A | B |
|---|
| bionics | science of creating artificial body parts |
| compound machine | a combination of simple machines |
| efficiency | work output divided by work input |
| effort arm | part of lever where a force is applied |
| effort force | force applied to a lever |
| fulcrum | the point around which a lever pivots |
| machine | a device that makes work easier |
| mechanical advantage | how much a machine multiplies the effort force |
| power | rate at which work is done (J/s) |
| Watt | unit used for power; =(J/s) |
| pulley | a groved wheel with a rope or chain |
| resistance arm | part of lever that lifts or cuts |
| resistance force | the weight or friction of the object being moved or cut |
| screw | an inclined plane wrapped around a cylinder |
| simple machine | device that does work in one movement |
| wedge | a moving single or double inclined plane |
| wheel and axle | two different-sized wheels that rotate together |
| ideal machine | a machine with 100% efficiency |
| Newtons (N) | units used for force; = kg*m/s2 |
| Joules (J) | units used for energy; = N*m |
