A simple pendulum consisting of a 10 m long string and a 0.20 kg bob is pulied to the side so that the string makes an angle of 20 with the vertical If the grevitational potential energy of the bob-Earth system is zero at the lowest point of the penduluns ars the angle at which the gravitational potential energy of the bob-Earth system is equal to the kanetic energy of the bob in most nearly 1.0 m 200 0.20 kg 6.9 9.8 C 10 D 14 E 19 A,