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March 25, 2017

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What constant net force is required to bring a 1500 kg car to rest from a speed of 100 km/h within a distance of 55 m?

  • physics - ,

    100 km/h = 100000m/3600s = 27.8 m/s
    Vf^2 = Vi^2+2as
    The final velocity, Vf, is 0
    0 = (27.8m/s)^2 + (2)(55m)(a)
    Solve for the acceleration, a.
    F = ma
    Use the acceleration from the previous step and the mass given to get the force, F.

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