Question: Which of the following statements could be true? a) A car moves with a constant speed around a circular track. b)A car moves with a constant velocity around a circular track. This is question #2 from the kinmatics quiz link on this forum. It marked me wrong for choosing A. But since speed does not imply direction, I don't see why it's speed can't be constant. How can the answer be B? If the track is circular, the car is accelerating and therfore changing its direction all the time. One moment it is doing 50mph North. A few moments later it is doing 50 mph South. It's velocity is constantly changing.