Circular Motion Practice

Question

A 75kg passenger is riding the cliffhanger barrel ride at the fair. If the barrel radius is 4m and the coefficient of friction between the rider and the wall is 0.5, what is normal force the rider experiences and the minimum speed the ride can turn so that the rider doesn't slide down the wall?

Answer 1

kmv²/r = mg; v = √gr/k = √9.8m/s²·4m/0.5 = 8.85 m/s

F = mv²/r