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12 Cards in this Set
- Front
- Back
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friction
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a force that opposes, or acts against, motion when two surfaces rub against each other
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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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the forces acting on an object are equal in size and opposite in direction, canceling each other out
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unbalanced forces
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forces that are not equal; one force is greater than its opposite force
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speed
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the measure of the distance an object moves in a given amount of time
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acceleration
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any change in velocity; when an object starts, I stops, speeds up, slows' down, or turns left or right, it changes velocity
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relative motion
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change in one object's position compared with another object's position
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how do you decide if something is moving?
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use the relative motion of objects around you
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frame of reference
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similar to your point of view
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vibration
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a circular motion or the moving back and forth rapidly and steadily
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velocity is a measure of change in direction - T/F
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False
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you always accelerate when you turn the corner on your bike - T/F
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True
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