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10 Cards in this Set
- Front
- Back
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force
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any push or pull that causes an object to move,stop, or change speed or direction.
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friction
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a force that opposes, or acts against, motion when 2 surfaces rub against each other.
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magnetism
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the force of attraction between magnets & magnetic objects.
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gravitation
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the force that pulls all objects in the universe toward one another.
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balanced forces
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equal in size & opposite in direction
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unbalanced forces
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occur when one force is greater than its opposite force.
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net force
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combined forces
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work
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use of a force to move an object through a distance
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power
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amount of work done for each unit of time
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machine
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something that makes a task easier by changing the size or direction of a force or the distance over which the force acts
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