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11 Cards in this Set
- Front
- Back
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Motion
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an object’s change in position over time when compared with a reference point
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Speed
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the rate at which an object moves; speed depends on the distance traveled and the time taken to travel that distance
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Velocity
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the speed of an object in a particular direction
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Acceleration
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the rate at which velocity changes; an abject accelerates if its speed changes, or its direction changes, or if both its speed and its direction changes
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Force
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a push or a pull; all forces have both size and direction
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Newton (N)
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the SI unit of force
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Net Force
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the force that results from combining all the forces exerted on an object
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Friction
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a force that opposes motion between two surfaces that are touching
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Gravity
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a force of attraction between objects that is due to their masses
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Weight
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a measure of the gravitational force exerted on an object, usually by the Earth
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Mass
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the amount of matter that something is made of; its value does not change with the objects location in the universe
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