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In a railroad yard, a 2.0×104 kg boxcar moving at 10m/s is brought to a stop by a spring-loaded bumper mounted at the end of the level track.
If the spring constant 1.7 MN/m , how far does it compress in stopping the boxcar?

What do i do?

  • Physics -

    kinetic energy lost = (1/2) m v^2
    potential energy gained = (1/2) k x^2

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