This might sound like a rather strange question, but I am slightly confused about the velocity of an object which is decelerating. Is the velocity just 0? Because that's what it is saying in this exercise question I found:
A cyclist starts from rest and accelerates at 1 m/s^2 for 20 seconds. He then travels at a constant speed for 1 minute and finally decelerates a 2m/s^2 until he stops. Find his maximum speed and the total distance he covered.
I have already found the first two parts, but not the thrird part (finally decelerates at 2m/s^2 until he stops).
I am using the formula
$$v^2 = u^2 + 2as$$
I rearranged it to make $s$ the subject. However, I don't know what the velocity is. Is it just $0$? If so, why?