A 15.0 kg child is riding a playground merry-go-round that is rotating at 50.0 rev/min. What centripetal force (in N) must she exert to stay on if she is 1.50 m from its center?  N (b) What centripetal force (in N) does she need to stay on an amusement park merry-go-round that rotates at 3.00 rev/min if she is 7.00 m from its center?  N (c) Compare each force with her weight. force from (a) weight= force from (b) weight

A point mass of 0.39 kg is set to rotate about a fixed axis 0.76 m away. The mass is initially at rest and undergoes a constant angular acceleration of 5.10 rad/s.At what time centripetal force acting on the mass be 50.8 N?

1. A 50-kg girl rides on a giant Ferris wheel of radius 12 m that makes 2 revolutions each minute. (a) (b) What is the girl's speed in m/s? What is the apparent weight of the girl at the lowest point in the ride? (Hint: Her apparent weight is equal to the force of the seat acting on her). ) What is the apparent weight of the girl at the highest point in the ride? If she felt weightless at the top of the ride, how fast would she be moving? (c) (d) Show transcribed image text 1. A 50-kg girl rides on a giant Ferris wheel of radius 12 m that makes 2 revolutions each minute. (a) What is the girl?s speed in m/s? (b) apparent weight is equal to the force of the seat acting on her). (c) in the ride? (d) I What is the apparent weight of the girl at the lowest point in the ride? (Hint: Her What is the apparent weight of the girl at the highest point If she felt weightless at the top of the ride, how fast would she be moving?

In 2015, in Warsaw, Poland, Olivia Oliver of Nova Scotia broke the world record for being the fastest spinner on ice skates. She achieved a record 342 rev/min, beating the existing Guinness World Record by 34 rotations. If an ice skater extends her arms at that rotation rate, what would be her new rotation rate? Assume she can be approximated by a 45-kg rod that is 1.7 m tall with a radius of 15 cm in the record spin.With her arms stretched take the approximation of a rod of length 130 cm with 10% of her body mass aligned perpendicular to the spin axis. Neglect frictional forces.