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Unit 6 Vocabulary
| Question | Answer |
|---|---|
| an inclined plane that changes the direction of an applied force | wedge |
| a device with few, if any, moving parts that makes it easier to do work | simple machine |
| the amount of work done per unit of time | power |
| a grooved wheel that turns by the action of a rope in the groove | pulley |
| the ratio between the work done by a machine and the work put into it | efficiency |
| a simple machine consisting of a bar and a pivot point | lever |
| the number of times a simple machine multiplies an effort force | mechanical advantage |
| what is necessary for a force to move an object through a distance; work is calculated by multiplying the force applied to an object by the distance the object moves | work |
| a simple machine made of an inclined plane wrapped around a central bar that can multiply an effort force | screw |
| the pivot point on a lever | fulcrum |
| a simple machine that consists of a wheel that applies an effort force and a smaller axle that produces an output force | wheel and axle |
| a straight, slanted surface that can multiply an effort force | inclined plane |
| product of the amount of input force and the distance the object moves | input work |
| product of the amount of output force and the distance the object moves | output work |
| fulcrum is located between the effort force and the output force (ex: see-saw, scissors) | first class lever |
| output force is between the effort force and fulcrum (ex: wheel barrow, bottle opener, paper cutter) | second class lever |
| effort force is between the output force and fulcrum (ex: fishing rod, broom, person’s arm) | third class lever |
| when 2 or more simple machines are combined (ex: scissors- lever and the blades are wedges) | compound machine |