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PS Ch 5 Kyle M
Section 1, 2, and 3
| Question | Answer |
|---|---|
| The amount of work done in one second. It is the rate at which work is done | Power |
| Work is 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 |
| The ratio of the output force to the input force | mechanical advantage |
| a measure of how much of the work put into a machine is changed into useful output work by a machine. | 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 slopeing 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 |