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18 October, 08:58

For a short period of time, the frictional driving force acting on the wheels of the 2.5-Mg van is N, where t is in seconds. If the van has a speed of 20 km/h when t = 0, determine its speed when t = 5 s.

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  1. 18 October, 09:01
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    15.6m/s

    Completed Question;

    For a short period of time, the frictional driving force acting on the wheels of the 2.5-Mg van is N = 600t^2, where t is in seconds. If the van has a speed of 20 km/h when t = 0, determine its speed when t = 5

    Explanation:

    Mass m = 2500kg

    Speed v1 = 20km/h = 20/3.6 m/s = 5.556 m/s

    To determine speed v2;

    Using the principle of momentum and impulse;

    mv1 + ∫₀⁵ F dt = mv2
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