Question

How does instantaneous velocity differ from average velocity?

Answer 1

Difference between instantaneous and average velocities:

Instantaneous Velocity	Average Velocity
1. It is the rate of change of displacement with time.	1. It is the ratio between the total displacement and the total time taken.
2. It is given as, $v_{inst}=\frac{dS}{dt}$ where $S$ is the displacement at time $t$.	2. It is given as, $v_{avg}=\frac{S_{total}}{t_{total}}$ where $S_{total}$ is the total displacement and $t_{total}$ is the total time taken.
3. It varies instantaneously with time.	3. It does not change as long as the total displacement remains constant.