PH 105 Midterm: ph105_sum12_exam3
Document Summary
Exam 3: solve 5 of 6 problems below. Indicate which problems you have chosen: all problems have equal weight, show your work for full credit. Signi cant partial credit will be given: you are allowed 1 sheet of 8. 5 x 11 in paper with notes/formulas and a calculator, do all work on separate sheets. A uniform disk with mass m = 2. 5 kg and radius r = 20 cm is mounted on a xed horizontal axle, as shown below. A block of mass m = 1. 2 kg hangs from a massless cord that is wrapped around the rim of the disk. Find the acceleration of the falling block, the angular acceleration of the disk, and the tension in the cord. Note: the moment of inertia of a disk about its center of mass is i = 1. 1 kg of liquid nitrogen at its boiling point of 195. 81 c is in an isolated container of negligible mass.
