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Work/Simple Machines
Question | Answer |
---|---|
actual mechanical advantage | The mechanical advantage that a machine provides in a REAL SITUATION. |
compound machine | A device that combines TWO OR MORE SIMPLE MACHINES. |
efficiency | The PERCENTAGE of the input work that is converted to output work. |
fulcrum | THE FIXED POINT around which a lever pivots. |
gears | Two or more wheels linked together by INTERLOCKING TEETH. |
ideal mechanical advantage | The MECHANICAL ADVANTAGE that a machine would have WITHOUT FRICTION. |
inclined plane | A simple machine CONSISTING OF A FLAT SURFACE with one end higher than the other. |
input force | The force exerted ON A MACHINE. |
joule | UNIT OF WORK equal to one newton-meter. |
lever | A simple machine consisting of a rigid object that PIVOTS ABOUT A FIXED POINT. |
machine | A DEVICE THAT CHANGES THE AMOUNT OF FORCE exerted or the direction in which the force is exerted. |
mechanical advantage | The number of times the force exerted on the machine IS MULTIPLIED BY THE MACHINE. |
output force | The force exerted on an object BY A MACHINE. |
pulley | A simple machine consisting of a GROOVED WHEEL around which is wrapped a rope, chain, or cable. |
screw | A simple machine that consists of AN INCLINED PLANE WRAPPED AROUND a central cylinder to form a spiral. |
wedge | A simple machine consisting of a device that is thick at one end and TAPERS TO A THIN EDGE at the other. |
wheel and axle | A simple machine consisting of TWO CIRCULAR OR CYLINDRICAL OBJECTS THAT ARE FASTENED TOGETHER and rotate about a common axis. |
work | THE PRODUCT OF FORCE AND DISTANCE when a force is used to move an object |