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significant figures (p17)
those digits in a measurement that are known with certainty plus the first digit that is uncertain

displacement (p41)
the change in position of an object

average velocity (p43)
the total displacement divided by the time interval during which the displacement occured

instantaneous velocity (p46)
the velocity of an object at some instant or at a specific point in the object's path

acceleration (p48)
the rate at which velocity changes over time; an object ~ if its speed, direction, or both change

Equation to find displacement with constant acceleration (given: initial & final velocity, change in time)
Δx = ^{1}/_{2} (v_{i} + v_{f}) Δt

Equation to find velocity with constant acceleration (given: initial velocity, acceleration, change in time)
v_{f} + v_{i} + a Δt

Equation to find displacement with constant velocity (given: initial velocity, acceleration, change in time)
Δx = v_{i} Δt + ^{1}/_{2} a(Δt)^{2}

