Chapter 2, Problem 2.9PE

(Physics: acceleration) Average acceleration is defined as the change of velocity divided by the time taken to make the change, as given by the following formula:

     $a=\frac{v_1-v_0}{t}$

Write a program that prompts the user to enter the starting velocity v₀ in meters/second, the ending velocity v₁ in meters/second, and the time span t in seconds, then displays the average acceleration. Here is a sample run:

Enter v0, v1, and t: 5.5 50.9 4.5

The average acceleration is 10.0889