A speed skater goes around a turn that has a radius of 29 m. The skater has a speed of 14 m/s and experiences a centripetal force of 450 N. What is the mass of the skater?

Answer 1

450 = m*v^2 / r
where m is mass, v is speed, and r is radius

Answer 2

A 0.0371 kg ball is shot from the plunger of a pinball machine. Because of a centripetal force of 0.0491 N, the ball follows a circular arc whose radius is 0.101 m. What is the speed of the ball?