7/04 You may retrieve your graded Test 4 by stopping by my office during my office hours (1-2 daily). The key for Test 4 will be available in the Noble Library Copy Center sometime Monday afternoon. 6/30 Error on HW Schedule for July 1 and 2. The HW assignments for these two days are reversed; i.e. the "Simple Harmonic Motion" HW should begin with problem 6, and the "Small Oscillations" HW should begin with problem 32. 6/26 In the HW for Friday June 27, please drop Chapter 14 problem 23 and add Chapter 14 problem 8. 6/26 The solutions for test 3 are now available at the Noble Library Copy Center. 6/23 For June 24, please drop CH 12 #11 and add the following problem. This problem has also been added to the Online Problems for June 18 - 24. PROBLEM G2 A metal ball is to be rolled down a track inclined at an angle theta with respect to the horizontal, starting from rest. The track is a pair of rails, with the separation distance between the two rails equal to the radius of the ball. (a) Find the acceleration of the ball after it is released. (b) Find a_x the horizontal component of the acceleration of the ball after it is released. (c) Find the angle theta for which a_x is a maximum. 6/19 Please make the following addition to HRW Chapter 11, problem 58. This has also been added to the online problem page for June 18 - 24. HRW - CHAPTER 11 58. You must do problem 58 twice, once using Newton's Laws, and once using Conservation of Energy. So add parts (c) and (d), in which you use Newton's Laws instead of Energy Conservation to do exactly the same problem as in (a) and (b). 6/18 The solutions for test 2 are now available at the Noble Library Copy Center. 6/13 In the HW for June 16, please drop Ch 8 #32 and add the following problem from Serway (this has also been added to the Online Problems for June 10 - June 16). SERWAY - CHAPTER 8 56. A 10-g mass is attached to the end of an unstressed, light, vertical spring (k = 49 N/m) and then dropped. Answer the following questions by considering the potential energy due to the spring plus the potential energy due to gravity, i.e. measure distances from the equilibrium position of the spring with no mass attached. (a) What is the maximum speed of the falling mass? (b) How far does the mass drop before coming to rest momentarily? (c) Repeat (a) and (b), but answer the questions by considering the potential energy of the spring with the mass attached, i.e. measure distances from the equilibrium position of the spring with the mass attached. 6/11 The solutions for test 1 are now available at the Noble Library Copy Center. 6/08 There is an error in the HW schedule for June 13. Please drop Ch 7 #22 from that day's list and add Ch 8 #18. (Ch 7 #22 is correctly assigned in the HW for June 12.) 6/02 The Old Tests, both with and without solutions, are now available in the Noble Library Copy Center. 5/30 Please make the following additions to the HW assignment for Mon 6/02: HRW - CHAPTER 2 12. (g) Find the acceleration of the particle at t = 10 s. HRW - CHAPTER 3 24. (d) Also find the solution graphically.