일반물리학 1 — Force and Motion-II: Problem 52

52 An amusement park ride consists of a car moving in a vertical circle on the end of a rigid boom of negligible mass. The combined weight of the car and riders is 6.0 kN, and the circle’s radius is 10 m. At the top of the circle, what are the (a) magnitude FB and (b) direction (up or down) of the force on the car from the boom if the car’s speed is v = 5.0 m/s? What are (c) FB and (d) the direction if v = 12 m/s?