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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 |