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significant figures (p17)
those digits in a measurement that are known with certainty plus the first digit that is uncertain
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displacement (p41)
the change in position of an object
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average velocity (p43)
the total displacement divided by the time interval during which the displacement occured
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instantaneous velocity (p46)
the velocity of an object at some instant or at a specific point in the object's path
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acceleration (p48)
the rate at which velocity changes over time; an object ~ if its speed, direction, or both change
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Equation to find displacement with constant acceleration (given: initial & final velocity, change in time)
Δx = 1/2 (vi + vf) Δt
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Equation to find velocity with constant acceleration (given: initial velocity, acceleration, change in time)
vf + vi + a Δt
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Equation to find displacement with constant velocity (given: initial velocity, acceleration, change in time)
Δx = vi Δt + 1/2 a(Δt)2
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