Question | Answer |
The amount of work done in one second | Power |
The transfer of energy that occurs when a force makes an object move | Work |
Device that makes doing work easier by increasing the force applied to an object, changing the direction of an applied force, or increasing the distance over which a force can be applied | Machine |
Force that is applied to the machine | Input Force |
Force applied by the machine | Output Force |
Ration of the output force to the input force | Mechanical Advantage |
Ratio of the output work done by the machine to the input work done on the machine, expressed as a percentage | Efficiency |
machine that does work with only one movement-- lever, pulley, wheel and axle, inclined plane, screw, and wedge | simple machine |
simple machine consisting of a bar free to pivot about a fixed point called the fulcrum | lever |
simple machine that consists of a grooved wheel with a rope, chain, or cable running along the groove; can be either fixed or movable | pulley |
simple machine that consists of a shaft or axle attached to the center of a larger wheel, so that the shaft and the wheel rotate together | wheel and axle |
simple machine that consists of a sloping surface, such as a ramp, that reduces the amount of force needed to lift something by increasing the distance over which the force is applied | inclined plane |
simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post | screw |
simple machine that is an inclined plane with one or two sloping sides | wedge |
machine that is a combination of two or more simple machines | compound machine |