1. The problem statement, all variables and given/known data Suppose an object moves in such a way that its acceleration vector is always perpendicular to its velocity vector. Show that speed of the object is constant. 2. Relevant equations For two vectors to be perpendicular: A[itex]\bullet[/itex]B=0 Speed of the object = ||Velocity Vector|| 3. The attempt at a solution I have no idea how to approach this question. How can the speed of the object affect whether or not the acceleration vector is perpendicular to the velocity vector?