5/01 The solutions to Test 5 are now available in the Noble Library Copy Center. My Exam-Week schedule will be similar to my regular schedule. I will have office hours as usual. I will also be available in my office during usual class hours and my help- study hour. Mr. Stangel is busy with exams this week, so his students should stop by my office to get their tests and HW. EXCEPTION: I have a dentist's appointment at 2 PM on Wednesday 5/02. I will return to the office ASAP once it is over. 4/25 There will be a nighttime help session at 7PM in PSF-173 on Thursday 4/26. No test hints will be given, no new material will be covered, and I will not do HW problems. I WILL answer your questions about concepts that you do not understand. Also, Mr. Foy is holding a review session in PSH-563 on Thursday between 5:00 and 7:00 PM. 4/20 There is an error in the syllabus. At the top of page 3, you will find the following statement: "Homeworks which would be due after the final recitation meeting can be turned in at the beginning of the final exam." This is incorrect. These HWs must be turned in at the beginning of Test #5 on Mon Apr 30. 4/17 The solutions to Test 4 are now available in the Noble Library Copy Center. 4/09 There will be a nighttime help session at 7PM in PSF-173 on Wednesday 4/11. No test hints will be given, no new material will be covered, and I will not do HW problems. I WILL answer your questions about concepts that you do not understand. Also, Mr. Foy is holding review sessions in PSH-360 on Tues and Wed between 3:30 and 5:30 PM. 4/06 The material we are covering for Test 4 is slightly different from last year. On the Old Tests, you should not only study Old Test 4, but also MC#1 and Problem #1 from Old Test 5. 4/03 There was an error in the posted answers to even-numbered problems. The error was in Serway Ch 11, problem 7(b). The error has now been corrected. I apologize for any confusion this may have caused. 3/22 The solutions to Test 3 are now available in the Noble Library Copy Center. 3/07 There will be a nighttime help session at 7PM in PSF-101 on Monday 3/19. No test hints will be given, no new material will be covered, and I will not do HW problems. I WILL answer your questions about concepts that you do not understand. 3/01 I made a mistake during Wednesday's lecture. In the RAISING THE PENDULUM BOB example I said that the bob is raised with constant velocity. This is of course not true. The bob is raised with constant speed. The direction is changing and the acceleration of the bob is the speed squared divided by the length of the string. The error doesn't change anything that we did. GBA 2/28 HW Problem #10 in Chapter Six has a misprint. Part (b) should read as follows. "(b) Find the work done on the rope by this force." 2/27 The solutions to Test 2 are now available in the Noble Library Copy Center. 2/19 There will be a nighttime help session at 7PM in PSF-173 on Tuesday 2/20. No test hints will be given, no new material will be covered, and I will not do HW problems. I WILL answer your questions about concepts that you do not understand. 2/13 I made a mistake during Monday's lecture. In our first example, the 4 and 6 kg masses hanging over the pulley, I solved for the acceleration of the system using two different methods. In method two, we used the full vector notation. In my explanation of that method, I said that we needed to choose the positive direction in the first step. This is FALSE. We can do this, but it is not necessary. Alternatively, in the first step, we may decide on the direction of the acceleration of each mass, and write our 2nd-law equations so that both sides of each equation are guaranteed to be positive. This is what we did, so our work was correct, but I described it badly. Happily, when we did the final example, in which the 6 kg mass was put on a 30 degree slope, I did describe this step correctly. As I said then, if you decide incorrectly for the direction of acceleration, and then you do the work logically, you will get a negative value for the magnitude of acceleration, which is nonsense. 2/06 The solutions to Test 1 are now available in the Noble Library Copy Center. 1/31 There will be a nighttime help session at 7PM in PSF-173 on Thursday 2/01. No test hints will be given, no new material will be covered, and I will not do HW problems. I WILL answer your questions about concepts that you do not understand. 1/26 There was an error in the posted answers to even-numbered problems. The error was in problem 8, Ch 2. The error has now been corrected. I apologize for any confusion this may have caused. 1/22 The old tests are now available in the Noble Library Copy Center.