일반물리학 1 — Force and Motion-II: Problem 59

59 In Fig. 6-47, a 1.34 kg ball is connected by means of two massless strings, each of length L = 1.70 m, to a vertical, rotating rod. The strings are tied to the rod with separation d = 1.70 m and are taut. The tension in the upper string is 35 N. What are the (a) tension in the lower string, (b) magnitude of the net force \(\vec{F}_{\text{net}}\) on the ball, and (c) speed of the ball? (d) What is the direction of \(\vec{F}_{\text{net}}\)?