| A | B |
|---|
| axle | the rod or shaft on which a wheel revolves |
| block and tackle | a combination of fixed and movable pulleys used to lift loads |
| bolt | a shaft with an inclined plane wound around it |
| effort | the force that is applied to a machine to produce an action |
| force | a push or pull that makes something move, slow down, stop, or the pressure that something exerts on an object |
| fulcrum | the pivot or turning point of a lever |
| gears | wheels with teeth used to turn other gears or be turned by other gears |
| inclined plane | a simple machine that is a sloping surface. It is used to alter the effort and distance involved in doing work |
| lever | a simple machine that turns on a pivot, called a fulcrum, to produce a powerful movement |
| load | the weight of an object that is moved by a machine, or the resistance to movement that a machine must overcome |
| mechanical advantage | the ability of a lever to increase the force (effort) applied to it |
| pulley | a grooved wheel over which a rope, chain, or belt passes |
| screw | a shaft with an inclined plane wound around it |
| system | a group of interacting objects |
| thread | a spiraling inclined plane placed on the shaft of a screw (bolt) or on the inside of a nut |
| wedge | moving inclined plane(s) |
| wheel and axle | a circular disc attached to a shaft at its center |
| work | the product of a force moving an object a measurable distance. Work =force x distance |
