Hello! The total force F = m*a applied to the bicycle is F = F1 - a*v^2, where F1 is the initial force applied to the bicycle, a is a constant and v is the velocity. That means that the total force applied to the bicycle decrease as velocity increases, like a wind resistance decreases acceleration. I know how to find the terminal velocity (maximum velocity that a bicycle can reach under constant initial force), I have to set the total force equal to 0 and then find v. But how can I present velocity v as a function of time so I can see how velocity on the graph approaches terminal velocity? Sorry if I didn't explain it well, I wrote in intuitively. I am thankful if anyone can help me.