A wheel of 0.50 m radius rotates at 15 rev/s. What is the acceleration at its outer rim in m/s2 They want tangential acceleration right? Is there anyway to solve this without angular velocity/speed as we haven't learned that yet. This is part of the practice questions for my midterm on Work/Energy and Kinematics, so I'm looking for one of those methods to solve it. The answer is 4.4x103 m/s2 but I can't seem to get that. Help?