15. A car initially traveling eastward turns north by traveling in a circular path at uniform speed X as shown in Figure P7.15. O 35.0 C The length of the arc ABC is 235 m, and the B car completes the turn in 36.0 s. (a) Determine A the car's speed. (b) What is the magnitude and Figure P7.15 direction of the acceleration when the car is at point B?17. (a) What is the tangential acceleration of a bug on the rim of a 10.0-in.-diameter disk if the disk accel- erates uniformly from rest to an angular speed of 78.0 rev/min in 3.00 s? (b) When the disk is at itsfinal speed, what is the tangential velocity of the bug? One second after the bug starts from rest, what are its (c) tangential acceleration, (d) centripetal accelera- tion, and (e) total acceleration? 2]. A 55.0-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.800 m around the pole. (a) Determine the force exerted by the horizontal rope on her arms. (b) Compare this force with her weight. 23. A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 32.0 m/s. With what maximum speed can it go around a curve having a radius of 75.0 m