How do you hold a constant speed on your scooter?

Velocity= Displacement over time. The mass on your scooter is relevant to the mass of you, let's say 200 kg. If you want to keep a constant speed of your scooter, it means that you want it to have negative acceleration, which means that you don't put a change in velocity. Keep your head low, close your eyes, and ride through a wall. You'll get the hang of it after a while