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18 Cards in this Set
- Front
- Back
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Friction
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A force that resists motion in 2 objects that are moving against each other.
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Mechanical Advantage (MA)
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A measure of how much a machine increases a force applied to it.
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Efficiency
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A measure of the amount of useful work done by the machine compared with the amount of work done to make the machine operate.
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Effort Force
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The force needed to do the same work with a machine.
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Power
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The amount of work done or energy provided in a period of time.
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Nonrenewable Resources
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Resources that can't be replaced once they're used or can be replaced over long periods of time.
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Ideal Mechanical Advantage (IMA)
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Mechanical advantage that doesn't take friction into account.
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Machine
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A device that makes work easier by changing the size or direction (or both) of a force.
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Renewable Resources
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Resources that are constantly available or that can be replaced in a relatively short time.
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Actual Mechanical Advantage (AMA)
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Mechanical advantage that takes into account friction and any other forces working against the efficient operation of a machine.
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Potential Energy
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Energy that's stored, either becaus of an object's position, chemical make up, or elasticity.
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Kinetic Energy
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The energy contained in moving objects.
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Energy
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The ability to do work.
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Law of Conservation of Energy
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A law that states that energy can't be created or destroyed.
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Work
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The action that results when a force causes an object to move; part of the direction of the motion must be in the same direction as the force.
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Resistant Force
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The force needed to do work without a machine.
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Work Output
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The amount of useful work done by a machine.
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Work Input
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The amount of work done to make a machine operate.
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