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March 26, 2017

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how large a force is required to accelerate a 1300 kg car from rest to a speed of 20 m/s in a horizontal distance of 80 m ? I'm trying to find the formula and then plug in the correct #'s into the formula.

  • physics - ,

    Vf^2=Vi^2+2*a*d

    but a=force/mass

    solve for F.

  • physics - ,

    v^2=u^2+2as
    v=final velocity
    u=initial velocity
    s=distance covered
    a=acceleration

    Substitute the given values in above equation and find a(a will be 2.5m/s^2)
    Now from the Newton's 2nd law of motion
    F=ma
    F=1300*2.5=3250N

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