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March 28, 2017

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A boxcar of mass 200 tons at rest becomes uncoupled on a 2.5 degree grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?

  • PHSICS - ,

    a=gsin(theta)
    a=9.8 sin 25°
    a= 0.43

    Uf=Ui +at
    Uf= 0 + a(10)
    Uf=0 +4.3
    Uf=4.3 m/s

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