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March 29, 2017

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A 900 kg car rolling on a horizontal surface has speed v = 55 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.2 m. What is the spring stiffness constant of the spring?

  • physics - ,

    the KE of the car= PE of the spring
    1/2 m v^2=1/2 k x^2
    solve for k

    velocity has to be in m/s

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