At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outer wall moves at a speed of 3.21 m/s, and an 75.7 kg person feels a 558 N force pressing against his back. What is the radius of a chamber?

2 answers

I know that Fc= mv^2r, and I keep getting r=.7154 but it says it's incorrect. What am I doing wrong? Help please!
Read the equation wrong, I got it. Sorry!