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unit f chapter 2
vocabulary
Question | Answer |
---|---|
the result when a force causes an object to move | work |
a simple machine that has a central pivot around which a wheel moves | wheel and axle |
a device that changes the amount of a force applied to an object the direction or both | machine |
a simple machine having a arm that moves around a fixed point | lever |
the fixed point on a lever | fulcrum |
a part of the lever on which a person or another machine applies a force | effort arm |
the resistance or load on a lever | resistance arm |
a wheel that has a groove along its edge | pully |
a device made of one or more machines | compound machine |
the ratio of the work that comes out of a machine to work into the machine | efficency |
a flat sloping surface | inclined plane |
a simple machine composed of one or two inclined planes | wedge |
an inclined plane wrapped around a cone or cylinder | screw |