The scalar absolute value (magnitude) of velocity is called speed, being a coherent derived unit whose quantity is measured in the SI (metric system) as metres per second (m/s or m⋅s−1). Velocity is a physical vector quantity both magnitude and direction are needed to define it. An object is accelerating if it is changing its velocity. Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. … The velocity of an object is the speed of an object moving in a definite direction. What is the meaning of rate of change of velocity? The rate of change of velocity is ACCELERATION. What is rate of change of velocity formula?
Like velocity, acceleration is a vector and has both magnitude and direction. Acceleration: The rate of change of velocity is acceleration.
