PHYS 1050 Final: PHYS 1050 Final Exam 2007 v2 Answers
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1 (a) (i) b is a stable equilibrium. 1 (a) (ii) fa > 0, fb = 0, fc < 0. 1 (a) (iii) |fa| is the greatest because the slope is the greatest. 5 (a) 9. 02 m/s, 46. 1 below the positive x axis. 5 (b) 3. 75 i + 6. 50 j m/s, 6. 25 i 6. 50 j m/s. 5 (c) 625 i 650 j kgm/s. 5 (d) r v cm" i = m(10. 0i) + m(0) r v 2" i m r v 1" i + m m + m r v 1" f + m m + m m r v 2" f. 6 (c) nf = 834 n (up), f = 360 n (right) = 5. 00i m / s m(3. 75i + 6. 50 j) + m(6. 25i " 6. 50 j) m + m m(3. 75i) + m(6. 25i) m + m m(10. 0i) m + m. 2 (f) 0. 913 i 5. 42 j m/s. 7 (b) (i) ei = ef mg(0. 4cos50) = kr.
