a 33 ms 2 right b 31 ms 2 right c 13 N 42 a 048 ms 2 43 a 49 N b 53 N c 44 N 44

A 33 ms 2 right b 31 ms 2 right c 13 n 42 a 048 ms 2

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40. (a) 3.3 m/s2[right] (b) 3.1 m/s2[right](c) 1.3 N 42. (a) 0.48 m/s 2 43. (a) 4.9 N (b) 5.3 N (c) 4.4 N 44. (d) 2.2 N 45. (b) 9.79 N / kg 48. 22 N [down] 49. (c) 2100 N [up] 50. (a) 0.61 51. (a) 5.2 N (b) 1.6 N 52. (a) 0.40 (b) 0.29 53. 7.7 m / s 2 [forward] 54. 18 N 55. 3.1 m 60. 17 N 61. 84 N 62. (a) 0.50 m / s 2 [forward] 63. 0.03 m / s 2 [left] 64. (a) 4.2 N (b) 420 N 65. (a) 3.7 m/s2 66. (b) 2.2 m/s 2 [right] for the jumpers 1.3 m/s 2 [left] for the boat 68. (a) 2.0 m/s 2 [forward]; 8.0 N (b) 1.0 m/s 2 [forward]; 8.0 N 69. (a) 2.6 m/s 2 [forward] (b) 11 N for rope A 25 N for rope B 70. (a) 250 N [up] for box 1 690 N [up] for box 2 (b) 190 N [up] for box 1 630 N [up] for box 2 (c) 250 N [up] for box 1 630 N [up] for box 2 71. 4.4 m / s 2 72. (a) 50 kg (b) 0.49 73. 0.56 m/s 2 for team 1 0.60 m/s 2 for team 2 74. (a) 7.8 m / s 2 (b) 0.74 m / s 2 Unit 3 Are You Ready ?, pp. 218–219 1. (a) 12 m (b) 0 N 5.1 Questions, p. 229 1. 325 J 2. (a) 18 kJ 3. (a) 830 J (b) 420 J 4. (b) 21 N (c) 2 250 J 5. (b) 12 kJ (c) 2 12 kJ 6. 2 J 7. (a) 9.9 m (b) The work done by gravity is 2 190 J. The work done by the rope is 240 J. (c) 44 J (d) 4.4 N; 44 J 9. (a) The work done in section A is 10 J; section B is 2.5 J; section C is 2 2.5 J. (b) 10 J 5.2 Questions, p. 235 1. 11 m/s 2. (a) 39 J (b) 32 N 3. (a) 6.6 kJ 4. 240 J 5.3 Questions, p. 241 2. (a) 13 J (b) 21 m (c) 24 m/s 3. 21 m 5.4 Questions, p. 249 1. 3800 J 2. (a) 42 % 3. 24 m/s 5.5 Questions, p. 254 1. (a) 5400 J (b) 170 W 2. (a) 3.6 s; 890 W 4. (a) 27 kWh (b) $540 Chapter 5 Self-Quiz, p. 261 1. (b) 6. (b) 11. T 2. (c) 7. (b) 12. F 3. (b) 8. (b) 13. F 4. (b) 9. F 14. F 5. (a) 10. T 15. F NEL 668 Appendix C
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Chapter 5 Review, pp. 262–267 1. (d) 2. (c) 3. (a) 4. (b) 5. (c) 6. F 7. T 8. F 9. F 10. (a) iii (b) iv(c) ii(d) i 12. no work done 14. 48 000 J 26. 110 kJ 29. 2 380 kJ 30. 210 kJ 31. 63 m 34. 48 m/s 37. 23 m/s [down] 38. (a) 1480 J (b) 1230 J 39. 68 MJ 42. 360 W 43. 360 W 44. 2.0 3 10 4 N; 1.4 3 10 5 m/s 2 47. (a) 220 J (b) 2 220 J (c) 0 J 48. 3.0 3 10 2 N when lifted 1.5 3 10 3 N when falling 49. (a) 110 J 50. (a) 5.8 × 10 6 J (b) 1.6 MJ at the beginning 3.7 MJ at the end (c) 2.1 MJ 53. (a) 86 N 57. 95 J 59. (a) 0.2 63. (a) 7.7 m (b) 6.0 × 10 4 J (c) 54 kW 64. 7.9 m/s 6.3 Questions, p. 287 2. 1.8 × 10 2 J 3. 1.0 × 10 4 J 4. copper 5. 18 °C 6. 220 g 7. 4.1 × 10 2 J/kg•°C 8. 36.8 °C 6.4 Questions, p. 295 2. (c) melting point is 55 °C boiling point is 90 °C 6. 2.6 × 10 6 J 7. 3.2 × 10 5 J 8. 2.7 × 10 6 J Chapter 6 Self-Quiz, p. 309 1. (a) 3. (d) 5. (a) 2. (b) 4. (b) 6. (d) 7. (c) 12. T 17. T 8. (c) 13. F 18. T 9. (d) 14. F 19. F 10. F 15. T 11. F 16. T Chapter 6 Review, pp. 310–315 1. (d) 2. (b) 3. (d) 4. (b) 5. (c) 6. (a) 7. (a) 8. (d) 9. F 10. T 11. F 12. T 13. F 14. T 15. T 16. (a) ii 18. Q 5 mc D T 33. 2 1.8 3 10 4 J 34. 160 °C 35. 3.5 kg 40. 2.4 3 10 5 J 41. glass 44. 0.84 kg 45. 88 mL 63. (a) 5.3 3 10 5 J 66. specific heat capacity is 2.40 3 10 2 J/kg•°C; silver 67. 0.10 kg 7.3 Questions, p. 333 2. (b) (i) 77 % (ii) 15 % 3. (a) 47 g (b) 26 g 5. approximately 2950 years ago 7. about 3.6 million years 7.4 Questions, p. 341 1. (a) 8.2 × 10 2 14 J (b) 1.5 × 10 2 10 J 2. 5.0 g 3. 5.8 × 10 2 14 J 4. 2.5 × 10 2 11 J 7.5 Questions, p. 347 3. (a) 7.54 MeV (b) 13.0 u 4. (a) 3.52 MeV/nucleon in Sample Problem 1 0.749 MeV/nucleon in Sample Problem 2 Chapter 7 Self-Quiz, p. 353 1. (c) 7. (a) 13. F 2. (a) 8. (b) 14. T 3. (b) 9. (a) 15. F 4. (c) 10. F 16. T 5. (d) 11. T 17. F 6. (b) 12. F Chapter 7 Review, pp. 354–359 1. (c) 2. (b) 3. (d) 4. (a) 5. (c) 6. (a) 7. (a) 8. (c) 9. (d) 10. (b) 11. F 12. T 13. T 14. T 15. T 16. T 17. T 18. F 19. F 20. (a) iii (b) i (c) iv (d) v (e) ii (f) vi
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