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Determine the stopping distances for an automobile going a constant initial speed of 97km/h and human reaction time of 0.50s , for an acceleration a=−6.5m/s2

  • physics -

    ***Convert initial speed to m/s

    a=-6.5m/s^2
    Vf=0
    d=?
    ***Vi=97km/h*(10^3m/1km)*(1h/3600s)=27m/s

    Use the following equation and solve for d:

    Vf^2=Vi^2+2ad

    0^2=(27m/s)^2+2(-6.5m/s^2)d

    729=13d

    Solving for d,

    729/13=d

    d=56m

  • physics -

    correct.

  • physics -

    wrong

  • physics -

    devron you suck

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