Problem 4. A uniform thin disk falls downwards into a corner. The disk contacts the corner at point C, which is at a 45 angle from the x axis (note the top view). Just before impact, the disk was not rotating and its center of gravity had a velocity vo (vertically downwards). The impact between the disk and the corner is fully plastic (the velocity of C just after impact is zero). Find the angular velocity of the disk just after impact. You must show a complete impulse-momentum diagram in your analysis. R C Top view 45 x To solve this problem, you must draw the 3 impulse-momentum diagrams. Indicate the linear and angular momentum (about G) for the disk before and after impact. Also indicate all of the impulses (forces) acting on the disk. This problem will be solved symbolically. Notice that c = 0 just after impact. You can say that the disk rotates about C just after impact. Check your solution: '=220 + 220 5 R 5 R