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12 Cards in this Set
- Front
- Back
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A push or pull
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Force
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When a force make an object move
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Work
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Forces that can start or stop motion and can change speed or direction
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Pushes or pulls
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A force that slows or stops moving objects
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Friction
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Help people use force to make work easier
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Simple machines
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A pulling force between one object and another
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gravity
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Help people use force to make work easier
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Simple Machines
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a simple machine made of a rope or chain wrapped around a wheel
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Pulley
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A simple machine made of a large wheel attached to a post or axle
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Wheel and Axle
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A simple machine with a slanted surface Example: A ramp
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Inclined Plane
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Is an incline plane wrapped around a post
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Screw
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Two incline planes joined back to back Wedges are used to split objects or to force them apart
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Wedge
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