A 60-kg person on a merry-go-round is traveling in a circle with a radius of 3 m at a speed of 3 m/s

a) what is the magnitude of the acceleration experienced by this person?

9/3=3m/s^{2}

B) what is the magnitude of the net force experienced by this person?

F= m x ac

Fc= 60(3)= 180

or this equation

v_{fy}=v_{oy}+at

Which equation should be used for B...I'm not sure