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14.4 Chemistry
Vocabulary Words
| Question | Answer |
|---|---|
| lever | a rigid bar that is free to move around a fixed point |
| fulcrum | the fixed point the bar rotates around |
| input arm | distance between the input force and the fulcrum |
| output arm | distance between the output force and the fulcrum |
| wheel and axle | a simple machine that consists of two disks or cylinders, each one with a different radius |
| inclined plane | a slanted surface along which a force moves an object to a different elevation |
| wedge | a V-shaped object whose sides are two inclined planes sloped toward each other |
| screw | an inclined plane wrapped around a cylinder |
| pulley | a simple machine that consists of a rope that fits into a groove in a wheel |
| compound machine | a combination of two or more simple machines that operate together |