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11 Cards in this Set
- Front
- Back
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displacement
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distance and direction between starting and ending positions.
ex. (12 km northeast) |
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speed
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distance traveled divided by the time needed to travel the distance.
ex. (6 km/h) |
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velocity
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displacement divided by time
ex. (2 km/h east) |
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acceleration
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change in velocity divided by the amount of time required for the change to occur.
ex. (9.8 m/s^2) |
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force
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a push or a pull
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first law of motion
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an object will remain at rest or motion in a straight line with constant speed unless it is acted upon by a force.
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balanced forces
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forces acting in equal but opposite directions.
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unbalanced forces
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forces acting on an object that do not cancel.
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second law of motion
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an object acted on by an unbalanced force will accelerate in the direction of the force.
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friction
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force that resists motion between surfaces that are touching.
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third law of motion
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forces always act in equal but opposite pairs.
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