Problem 4 The picture shows a solid disk hanging from the ceiling by a string that is wrapped around it. The disk's mass is m = 1kg and its radius R = 2 cm. As the disk falls the string unrolls, and the rolling without slipping condition holds. (a) Draw an extended free-body diagram for the disk. (b) What is the linear acceleration of the disk? (Use Idisk = $m.R?) (c) What is the torque on the disk? (Taken around the center of the disk.) m (d) What is the angular acceleration of the disk? (e) If the string is 1 m in length, through how many rotations does the disk go before it is completely unraveled