Imagine there is an object on the surface. The surface is uniform smooth(with same friction over the all surface and friction is greater than 0). Let's define the friction be f. Act a f force to horizontally to the object continuously, it is continuous added. It is obviously stationary. I'm quite confused of here then. If there is 1N force pushed to it in the same direction to the f force added by hand. What will be observed? a.Move with acceleration first, then remains the velocity later on. b.1.If f>kinetic friction, then the object accelerates first then decelerates to stop. b.2. If f> kinetic friction, then the object will accelerates continuously forward. Which one is correct?