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18 Cards in this Set
- Front
- Back
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if you double the weight of an object, how much work is required to move it
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double the work
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how does a fixed pulley give you an advantage
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it doesn't multiply the effort force
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measure of how much of the work put into the machine is changed to useful work put out by a machine
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efficiency
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does a fixed pulley give you any advantage in force?
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no only a change in direction
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rate at which work is done
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power
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MA of inclined plane
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length of slope/height of slope= l/h
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what does a MA of more than 1 mean in terms of force
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effort if being multiplied and you're gaining an advantage in force
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number of times a machine multiplies the force
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mechanical advantage
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watt
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unit of power
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how to reduce friction for better efficiency
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use a lubricant so there's less friction
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Power
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work/time
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what is a system of pulleys working together called
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block and tackle
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work=
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force * distance
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why is the MA of a fixed pulley always 1
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b/c it doesn't multiply the force
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what things are a simple machine able to do
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change direction, change size, both, do work
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the 2 groups all simple machines fall into
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lever or inclined plane
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MA for a lever
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length of effort arm/ length of resistance arm
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MA for wheel and axle
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radius of wheel/radius of axle
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