Terminal velocity if it has reached its top speed. Or obviously constant speed.
You have a constant speed.
Refraction.
Subsonic
Instantaneous Speed.
The study of speed is called kinetics. It involves analyzing the motion of objects and the factors that affect their speed.
Speed and direction is called velocity.
The type of force that keeps objects moving in a circle or an arc is called centripetal force. It acts towards the center of the circular path and is responsible for changing the direction of the object's velocity without changing its speed.
The speed is v and the starting speed is v0.
An object's motion can change by speeding up, slowing down, changing direction, changing speed, or coming to a complete stop.
The recognition that objects are constant and unchanging even though sensory input about them is changing is called object constancy. This concept helps individuals understand that objects remain the same despite changes in how they may appear or how they are perceived.
The speed limit of falling objects is called terminal velocity. This is the constant speed that a freely falling object eventually reaches when the resistance of the medium it is falling through (like air) equals the force of gravity acting on it.
Acceleration refers to increasing or decreasing speed. When an object changes its speed, it is said to be accelerating, whether the speed is increasing or decreasing. Changing direction is related to a different aspect of motion called velocity.