If an object's velocity changes over time, it is accelerating.
The rate at which velocity changes over time is known as acceleration. In calculus, acceleration is the derivative of velocity with respect to time.
Velocity.
It changes over time.
Acceleration.
Changes in position over time is motion, and the rate of change may be velocity or speed.
How the speed of something changes over time.
Changes in position over time is motion, and the rate of change may be velocity or speed.
The rate of change of velocity over time is called acceleration. It can be as a result of increase or decreased speed, or change of vector.
Acceleration. Not buttery in the slightest.
acceleration is the rate of change of velocity with respect to time.
Acceleration is the rate of change of velocity.
Usually the direction of motion changes over time.