11. A pendulum consists ofa 2.2 kg bob attached to a 2.8 meter long string. When the bob is released from its initial height (at an angle bigger than 29"), it has a velocity of 4.7 m/s as it passes the bottom. Considering the point where the string makes a 29 angle with the vertical, determine the following: a. The Ep of the bob at 29. (hint: construct a right triangle at point c and use trigonometry to nd h) b. The speed of the bob when it is at 29. c. What is the angle of the string when the bob is at its highest point