When you have learned to integrate, find the dependence on time of the instantaneous velocity of the ball.

Explanation

It follows from the formula `a=(dv)/(dt)= 5.10-22.5v` that
`int(dv)/(5.10-22.5v)= int dt, v=0.227(1-e^(-22.5t))`
Compare the result obtained with the speed calculated with the aid of numerical methods.