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Chapter unit f2
vocab and questions
| Question | Answer |
|---|---|
| The result when a force causes and object to move | work |
| a device that changes the amount of a force a device that changes the amount of force applied to an object the dirction of a force or both | machine |
| a simple machine having an arm that moves about a fixed point | lever |
| the fixed point on a lever | fulcrum |
| the part of a lever on which a person or another machine applies force | effort arm |
| the part of a lever that apples a force on an object | resistance arm |
| a wheel that has a groove along its edge | pulley |
| a simple machine that has central pivot around around which a wheel moves | wheel and axle |
| a flat sloping surface | inclined plane |
| a simple machine composed of one or two inclined planes | wedge |
| an inclined plane wrapped around a cylinder or cone | screw |
| a device made up of two or more machines | compund machine |
| the ratio of the work that comes out of a machine applies a force | effeciancy |