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20 Cards in this Set
- Front
- Back
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resistance arm
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the part of the lever that exerts the resistance force
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screw
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a simple machine consisting of a special type of inclined plane wrapped in a spiral around a cylindrical post.
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wheel and axle
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a simple machine consisting of 2 different-sized wheels that rotate together, such as a doorknob or wheel-handled faucet.
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resistance force
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the force exerted by a machine to overcome resistance to gravity or friction
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wedge
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A simple machine consisting of a moving inclined plane with one or two sloping sides; examples are knife and chisels
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How many simple machines are there? Name them.
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(6)
lever, pulley, wheel and axle, inclined plane, screw, wedge. |
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simple machine
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a device that accomplishes work with only one movement.
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pulley
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a simple machine consisting of a grooved wheel with a rope or chain running along the groove
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bionics
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The science of designing artifiacial replacement (prostheses parts for the body.
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compound machine
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A combination of 2 or more machines
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efficinency
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ratio of the useful work put out by a machine to the work put into that machine; effeiciency is always less than 100%
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effort arm
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the part of a lever on which an effort force (F ) is applied
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power
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the measure of the amount of work done in a specific amount of time; power is measured in watts and equals 1 joule/second
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mechanical advantage
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the number of times a machine multiplies the effort force applied to it.
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effort force
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the force applied to a machine when a machine is used to do work.
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machine
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a device that makes work easier by changing the size of the force applied to it and /or the direction of that force.
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Fulcrum
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the fixed point around which a lever pivots
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ideal machine
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a machine in which work input equals work output; such a "perfect" machine would be frictionless and 100% efficient
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inclined plane
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a simple machine consisiting of a sloping surface (ramp) used to raise objects
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lever
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a simple machine consisting of a bar that is free to pivot (rotate) around a fixed point (fulcrum)
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