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Answers to Problems in Part II

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CHAPTER 10

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    1. 111.25 N

    2. 73 kg

    3. 27.94 cm

    4. 6.1 m/s

    5. 2.84 liters

    1. 50 cm

    2. 22.4 cm

    3. 54 cm

    4. 71.7 cm

    1. x = 40.78 m/s; y = 19.02 m/s

    2. x = −60.1 N; y = 60.1 N

    3. x = 75.85 kg; y = −90.39 kg

    4. x = −21.65 m/s2; y = −12.5 m/s2

  1. s = 28 m; d = 12 m

  2. x = 627.8 N; y = 168.2 N

  3. V = 28.65 m/s; v = 93.98 ft/s;

    θ = 29.25 degrees or .51 radians

  4. Horizontal (x) = 103.4 N;

    vertical (y) = 37.6 N

    1. 1992 m at 106°

    2. Rectangular = −535 m, 1919 m

      Polar = 1992 m, −74 degrees or 106 degrees from start

  5. x = 112.5 lb; y = 51 lb; R = 123.5 lb;

    θ = 24°

    1. x (stabilizing) < 834.5 N;

      y (rotary) < 337 N

    2. 1359 N; θ = 20 degrees

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CHAPTER 11

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  1. 1,500 m = 12.19 m/s

    5,000 m = 11.27 m/s

    10,000 m = 11.09 m/s

  2. t = 0.177 sec

  3. t = 3.9 sec Θp; total = 7.8 s

    y = 38.2 m/s

  4. t = 3.46 sec; s = 58.7 m

    t = 2.4 sec; s = 49.88 m

  5. Start of force: ω = 1,089.7 deg/sec (19 rad/sec)

    Contact: ω = 1,153.8 deg/sec (20 rad/sec)

    v = 7 m/s

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CHAPTER 13

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  1. x (stabilizing) = 77.6 N; y (rotary) = 289.8 N

  2. E = 6.7 N

  3. EA = 1.6 m; RA = 0.4 m

  4. EA = 1.6 m; RA = 0.4 m

  5. E = 287.5 N

  6. 3 cm: T = 16.5 Nm

    15 cm: T = 82.4 Nm

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