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Appendix H. Answers to Problems in Part II

  • 2. a. 111.25 N
    • b. 73 kg
    • c. 27.94 cm
    • d. 6.1 m/s
    • e. 2.84 liters
  • 3. a. 50 cm
    • b. 22.4 cm
    • c. 54 cm
    • d. 71.7 cm
  • 4. a. x = 40.78 m/sec; y = 19.02 m/sec
    • b. x = – 60.1 N; y = 60.1 N
    • c. x = 75.85 kg; y = –90.39 kg
    • d. x = – 21.65 m/s2; y = –12.5 m/s2
  • 5. s = 28 meters; d = 12 meters
  • 6. x = 627.8 N; y = 168.2 N
  • 7. V = 28.65 m/s; v = 93.98 ft/s; θ = 29.25 degrees or .51 radians
  • 8. Horizontal (x) = 103.4 N; vertical (y) = 37.6 N
  • 9. c. 1992 m at 106°
    • e. Rectangular = –535 m, 1919 m Polar = 1992 m, –74 degrees or 106 degrees from start
  • 10. x = 112.5 lb; y = 51 lb; R = 123.5 lb; θ = 24°
  • 11. b. x (stabilizing) ≊ 834.5 N; y (rotary) ≊ 337 N
  • 12. 1359 N; θ = 20 degrees

  • 3. 1500 m = 12.19 m/s
    • 5000 m = 11.27 m/s
    • 10,000 m = 11.09 m/s
  • 5. t = .177 sec
  • 7. t = 3.9 sec up; total = 7.8 sy = 38.2 m/s
  • 11. t = 3.46 sec; s = 58.7 meterst = 2.4 sec; s = 49.88 meters
  • 12. Start of force: ω = 1089.7 deg/sec (19 rad/sec)
    • Contact: ω = 1153.8 deg/sec (20 rad/sec)v = 7 m/s

  • 4. x (stabilizing) = 77.6 N; y (rotary) = 289.8 N
  • 9. E = 6.7 N
  • 10. EA = 1.6 meters; RA = 0.4 meter
  • 14. E = 285 N
  • 15. 3 cm: T = 1.7 kg ˙ m
    • 15 cm: T = 8.3 kg ˙ m

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