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3 | Nyaye S BA — w Jaconsen Tat! 2002 University of California - Midterm 2 Department of PI Physics 8A, Fall Second Midterm Exam November 6, 2002 You will be given 100 minutes to work this exam, No books, but you may use a handwritten note sheet no larger than an 8 1/2 by 11 sheet of paper. Your deseription of the physics involved in a problem is worth significantly more than any numerical answer. Show all work, and take particular care to explain what you are doing. Write your answers directly on the exam, and if you have to use the back of a sheet make sure to put a note on the front. Do not use a blue book or scratch paper. sin 45° = 0.707, cos 45° = 0.707, sin 30° = 0.500, cos 30° = 0.866 Rotational Inertias for radius R or length L: sphere about axis: (2/5)MR2 spherical shell about axis; (2/3)MR2 disk about axis: (1/2)MR2 hoop about axis: MR2 rod about perpendicular at midpoint: ML2/12 1 GM.M. k Ig = ~ 5 ev" +¥gp +P = constant Fe - - on fe of SiFema Each part is worth the number of points indicated, These should sum to 100 points. Setup and explanation are worth almost all the of the points. Clearly state what you are doing and why. In particular, make sure that you explain what principles and conservation mules you are applying, and how they relate. 3. —_ 4 : LK . DISCUSSION SECTION DATE/TIME: _Miwn.\- pnw 5 6 Read the problems carefully. Try to do all the problems. If you get stuck, go on to the next problem. total Don't give up! Try to remain relaxed and work steadily. 
