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Andrew
Andrew asked in Science & MathematicsPhysics · 3 days ago

Physics Homework?

A 5.8 × 105 kg subway train is brought to a stop from a speed of 0.55 m/s in 0.45 m by a large spring bumper at the end of its track.

1.) What is the force constant k of the spring in N/m?

2 Answers

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  • oubaas
    Lv 7
    3 days ago
    Favorite Answer

    m*V^2 = k*x^2

    k = m*V^2/x^2 = 5.8*10^5*0.55^2/0.45^2 = 8.7*10^5 N/m 

  • Whome
    Lv 7
    3 days ago

    The kinetic energy will be converted to spring potential

    ½kx² = ½mv²

    k = mv²/x²

    k = 5.8e5(0.55²) / 0.45²

    k = 866,419.753... ≈ 8.7e5 N/m◄

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