Newton's first law of motion
an object's motion will not change unless an unbalanced force acts on the object
distance
How far an object moves
Displacement
Distance and direction of an object's change in position from the starting point.
speed
The distance an object travels per unit of time
Velocity
the speed and direction of a moving object
Acceleration
The rate at which velocity changes
force
a push or pull on an object
inertia
The tendency of an object to resist a change in motion
constant
neither slows down or stops
instantaneous speed
the speed of an object at one instant of time
negative acceleration
slowing down