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college physics

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A 1300 kg car rolling on a horizontal surface has speed v = 65 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.9 m. What is the spring stiffness constant of the spring?

  • college physics -

    Solve this equation for k:

    (1/2) k X^2 = (1/2) m V^2

    (Initial kinetic energy) = (compressed spring potential energy)

    V must be in m/s and X must be in meters.

    k will be in N/m

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