In a 100 metre sprint, an athlete reaches her maximum speed in 3.0 seconds, starting from rest, assuming constant acceleration. She maintains her maximum speed until the finish, with an overall time of 11.0 seconds. Determine her maximum speed, vmax. I'm trying to solve this problem but it is with little successes, I realised that this is not a constant motion (she stop accelerating). Thus I have to solve it with some kind of integration. Can any one tell me what equation do I have to use?