average speed
the rate at which an object is moving at a given moment in time.
velocity is your answer.
speed if no direction is needed velocity if direction is needed
No. Average speed is the rate an object is moving measured over more than an instant, such as one second, one minute, or something like that. Instantaneous speed, however, is the limit of the average speed as the interval of time approaches zero, i.e. at a given instant.
Instantaneous velocity is the rate at which an object is moving in a uniform direction, distance per unit time, at any given instant in time. instantaneous acceleration is the rate at which an object's velocity is changing at any given instant in time
instant heart rate
the rate at which an object is moving at any given moment in time. from the physical science glossary
If the displacement of the object (its position) can be described as a functional or algebric equation, you can find the instant speed of this object by calculating the derivative of its displacement equation, knowing that speed is the first derivative of position and acceleration, its second.
rate of motion is speed or velocity
The answer is: Instantaneous Acceleration.
It is the object's velocity.
Its "velocity".