1. A pendulum is released from the horizontal position as shown in the figure below. The ball has a mass m = 5 kg and a radius r = 10 cm. The string is massless and has a length L = 2 m. A pin (of negligible size) is located a distance 4L/5 directly below the pendulum's pivot point. When the pendulum reaches the bottom, it begins to wrap around the pin. 4L/5 a. What is the ball's speed when it is directly above the pin? b. What is the tension in the string at this point