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? asked in Science & MathematicsPhysics · 10 years ago

Physics F=MA question. 10 points.?

A car engine provides a constant forward force. When starting from rest, the acceleration of the car when unloaded is A. The mass of the car increases by 50% when fully loaded. Determine the acceleration of this fully laden car in terms of the acceleration A when it starts from rest.

I know F = m x a.

F = 1.5m x A is that right? I don't get it.

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  • just me
    Lv 6
    10 years ago
    Favorite Answer

    F = MA

    so AM = F

    so A = F/M

    so A = F/1.5M for fully loaded :)

  • Anonymous
    10 years ago

    a(empty)=F/m

    a(loaded) = F / (1.5 m) = a(empty)/1.5 = (2/3) a(empty)

    So the loaded acceleration is two-thirds of the unloaded car's acceleration.

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