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Distance
physical meaning, scalar or vector, defining equation (if any), units
- How far you go
- scalar
- no defining equation
- meters
-
Displacement
physical meaning, scalar or vector, defining equation (if any), units (linear, quadratic or constant with respect to time)
- how far you end up from the origin, including direction
- vector
- (xf - xi)
- meters
- vertical position changes quadratically with time
-
speed
physical meaning, scalar or vector, defining equation (if any), units
- how fast you are going, not including direction
- scalar
- change in distance/time
- m/s
-
velocity
physical meaning, scalar or vector, defining equation (if any), units, (linear, quadratic or constant with respect to time)
- speed including direction
- vector
- (change in displacement)/time
- m/s
- vertical velocity changes linearly with time
-
acceleration
physical meaning, scalar or vector, defining equation (if any), units
- Speed of change of velocity, including direction
- vector
- (change in velocity)/time
- m/s2
-
scalar
has only magnitude or size
-
vector
has magnitude and direction
-
free fall
when an object is subjected only to the force of gravity (dropped, thrown upward or thrown downward). a=g=9.8m/s2
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