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16 Cards in this Set
- Front
- Back
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define reference point
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an object that appears to stay in place
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define motion
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an object's change in position over time when compared with a reference point
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define speed
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the rate at which an object moves
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what 2 things does speed depend on?
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distance traveled and time taken to travel that distance
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give the formula for average speed
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Total distance divided by total time
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define velocity
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the speed of an object in a particular direction
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define acceleration
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the rate at which velocity changes.
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what changes with velocity?
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speed or direction
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Give the formula for acceleration
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final velocity minus starting velocity divided by the time it takes to change velocity
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what is positive acceleration?
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speeding up
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what is negative acceleration?
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slowing down
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what is centripetal acceleration?
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acceleration that occurs in a circular motion
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define force
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a push or pull
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force is expressed with which unit?
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newton
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define net force
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the force that results from combining all the forces exerted on an object
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unbalanced forces will lead to what?
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a change in motion
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