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If a small sports car collides head on w...

If a small sports car collides head on with a massive track, which vehicle expenences the greater impact force? Which vehicle experiences the greater acceleration?

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The car and truck experience forces that are equal in magnitude but in opposite directions. A calibrated spring scale placed between the colliding vehicles reads the same whichever way it faces. Because the car has the smaller mass, it stops with much greater retardation.
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