The ratio of average velocity to instantaneous velocity (or speed) can be calculated using the following formula:
Ratio = Average Velocity / Instantaneous Velocity
To find the average velocity, you divide the displacement (change in position) by the total time interval:
Average Velocity = Displacement / Time
To calculate the instantaneous velocity (or speed) at a specific point in time, you would need the derivative of the position function with respect to time. In other words, you take the derivative of the position function to obtain the velocity function and evaluate it at the desired time:
Instantaneous Velocity = d(position) / dt
Once you have the average velocity and instantaneous velocity (or speed), you can then calculate their ratio using the formula mentioned above.