Chapter 8, “Motion in One Dimension”
Displacement with Constant Velocity
displacement = velocity * time (D = v * t)
for any constant velocity v.
Displacement Between Frames
new_position = old_position + velocity * time
where time is one frame (usually 
of a second).
Average Velocity
for any displacement Δx and time interval t.
Acceleration
Equation 1
vf = vi + at
Equation 2
for constant acceleration only.
Equation 3
Δx = ½(vi + vf)t
Equation 4
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