car
negative acceleration, also deceleration
Deceleration
condensation and the speed decreases
condensation and the speed decreases
Subsonic
Instantaneous Speed.
the speed of the molecules decreases.
decreases
Speed and direction is called velocity.
Terminal velocity if it has reached its top speed. Or obviously constant speed.
Derivative
If speed increases, or if the moving object curves up or down or to the right or to the left, or if speed decreases, any of these events is called "acceleration".
The speed is v and the starting speed is v0.