Question 14 part 1 of 1 10 points A 29 g ball is fastened to one end of a string 79 cm long and the other end is held fixed at point O so that the string makes an angle of 320 with the vertical, as in the figure. This angle remains constant as the ball rotates in a horizontal circle. The angle 0 would remain constant only for a particular speed of the ball in its circular path. The acceleration of gravity is 9.8 m/s2. 9.8 m/s2 320 79 cm 29 g Find this speed v. Answer in units of m/s. Question 15 part 1 of 1 10 points An airplane moves 171 m/s as it travels around a vertical circular loop which has a radius of 0.81 km. The acceleration of gravity is 9.8 m/s2. What is the magnitude of the normal force on the 120 kg pilot of this plane at the bottom of this loop? Answer in units of kN