Question

What can be defined as the rate at which velocity changes

Answer 1

The rate at which velocity changes can be defined as acceleration or average acceleration.

Explanation:

The acceleration is defined as the rate of change of velocity with respect to time. So, the change in velocity from the initial velocity at different time intervals will help to attain the acceleration attained by the object.

                     $\ a =\frac{v_{f}-v_{i}}{\Delta t}$

where,

$v_{f} \text { and } v_{i}$ – final and initial velocities, $\Delta t$– time  

If the change in velocity is constant for same time interval, then the acceleration will be constant for that object. So, an object can attain uniform acceleration when the velocity changes uniformly with time.

Answer 2

Answer:

acceleration

Explanation:

The rate at which velocity changes is the definition of the physical quantity called acceleration, and it is given by the formula: $a=\frac{v_f-v_i}{\Delta t}$

where $\Delta t$ is the time that took to change from the initial velocity $v_i$ to the final velocity $v_f$