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15 Cards in this Set
- Front
- Back
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When does work occur?
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When a force causes an object to move in the direction of the force.
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What unit is used for force?
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Newtons
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What unit is used for distance?
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Meters
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What unit is used for work?
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Joules
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What is the formula for work?
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force x distance
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What is Power?
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The rate at which work is done.
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What is the formula for power?
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work divided by time
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What unit is used for power?
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watt
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What is a machine?
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A devise that makes work easier by changing the SIZE and DIRECTION of a force.
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How does a machine make work easier?
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It allows you to apply a SMALLER FORCE over a LONGER DISTANCE.
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Work output must equal what?
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work input
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What is Mechanical Advantage?
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A number that tells how many times a machine multiplies force.
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What is the formula for Mechanical Advantage?
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output force divided by input force
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What is Mechanical Efficiency?
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A comparison of a machine's work output with the work input.
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What is the formula for Mechanical Efficiency?
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work output divided by work input multiplied by 100.
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