Demonstrate the effect of simple machines on work
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| work | the transfer of energy to an object by using a force that causes the object to move in the direction of the force
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| machine | a device that helps do work either by overcoming a force or changing the direction of the applied force
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| inclined plane | a simple machine that is a straight, slanted surface, which facilitates the raising of loads; a ramp
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| wedge | a simple machine that is made up of two inclined planes and that moves; often used for cutting
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| screw | a simple machine that consists of an inclined plane wrapped around a cylinder
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| lever | a simple machine that consists of a bar that pivots at a fixed point called a fulcrum
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| pulley | a simple machine that consists of a wheel over which a rope, chair, or wire passes
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| wheel and axle | a simple machine consisting of two circular objects of different sizes; the wheel is the large of the two circular objects
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