1. The problem statement, all variables and given/known data A particle moves in a plane with constant radial r=4m/s. The angular velocity is constant and has magnitude [itex]\Theta[/itex]=2rad/s. When the particle is 3m from the origin, find the magnitude of the velocity and the acceleration. 2. Relevant equations 3. The attempt at a solution The answer is v=root of 52 m/s. But I don't know how to get this number. Can somebody give me a hint?