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machine that does work with only one movement-lever, pulley, wheel & axle, inclined plane, screw, wedge

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Simple machines allow people to get more done with less work

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simple machine consisting of a bar free to pivot about a fixed point called the fulcrum

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IMA = DI/DO

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A seesaw

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As something pushes down on one side of the bar, the opposite side goes up and vise versa.

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Textbook page 860
Google images

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simple machine that consists of a grooved wheel with a rope, chain, or cable running along the groove; can be either fixed or movable

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IMA=N

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Elevators

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As one side of the rope/cable is pulled down and around the wheel, the other side (elevator) goes up and over.

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simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post

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Textbook page 864
Google images

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IMA=2πd/P

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The lid of a peanut butter jar.

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You apply force by turning it, then it either tightens or loosens the lid depending on which way you turn it

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simple machine that consists of a sloping surface, such as a ramp, that reduces the amount of force needed to lift something by increasing the distance over which the force is applied

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IMA=L/h

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The ramp for a moving truck

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It keeps you from going straight up, so it takes less force to get stuff in the truck

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Textbook page 858
Google images

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simple machine that consists of a shaft or ale attached to the center of a larger wheel, so that the shaft and the wheel rotate together

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IMA=R

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A pepper grin

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As you turn the axle/handle on the grinder, it turns the wheel which crushes the pepper.

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Textbook page 870
Google images

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simple machine that is an inclined plane with one or two sloping sides

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IMA= L/t

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Knife

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There are two inclined planes put together to make a sharp edge. When you force this edge down, the ting you are cutting is pushed to the side as shown in this picture.

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Textbook page 870
Google images

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Textbook page 866
Google images