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15 April, 13:54

A 960 kg motorboat accelerates away from a dock at 2.3 m/s2. t Its propeller provides a thrust force of 4.1 kN.

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  1. 15 April, 14:59
    0
    For a motorboat:

    F m = m · a = 960 kg · 2.1 m/s² = 2208 N

    Propeller provides trust force F p = 4.1 kN = 4100 N

    We have to find drag force exerted by the water on the boat.

    F = 4100 N - 2208 N = 1892 N = 1.9 kN (with 2 significant figures)

    Answer: 1.9 kN
  2. 15 April, 17:30
    0
    m = 960 kg a = 2.3 m/s^2 F = ma = 960 x 2.3 = 2208 N Thrust force = Fa + Fd Drag Force Fd = 4100 - 2208 = 1892 N
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