1. The problem statement, all variables and given/known data In an amusement park ride, people are spun at 5 radians per sec in a 3 m cylinder. What is the coefficient of friction to prevent people from falling down? 2. Relevant equations Centripetal Force= (mv^2)/r Force of friction=(mu)(mg) Velocity=(r)(ω) 3. The attempt at a solution V=(3 m)(5 rad/sec)=15 m/s Centripetal Force=(M(15^2))/3=75M Centripetal force=force of friction... 75M=9.8(mu)M 75/9.8=(mu)=7.653?