It's a central tenet of Newtonian mechanics that force is the product of mass and acceleration. For this reason, a commonly used unit of force, the Newton (N), represents kilogram meters per second squared, the kilogram being a unit used for mass, and meters per second squared being a unit used for acceleration. Because mass and acceleration bear the same relationship to force, either can be derived by finding the quotient of the other and a given force. For example, mass equals the quotient of force and acceleration; acceleration equals the quotient of force and mass. You'll have no trouble finding the maximum force of an object.
Things You'll Need
 Stopwatch
 Calculator

Determine the mass of the object. For example, you may look in a reference manual and find that your Maserati Tipo 61 weighs 600 kilograms.

Use a stopwatch to find how long it takes the object to accelerate from an initial speed to a final speed. For example, it takes 10 seconds for your Maserati to accelerate from 10 to 80 miles per hour.

Subtract the initial speed of the object from the final speed of the object and divide by the time it took the object to accelerate. For example, (8010)/10 = 7.

Multiply your answer by 1,609. For example, 7 x 1609 = 11263.

Multiply your answer by the weight of the object. For example, 11263 x 600 = 6757800. The maximum force of your Maserati Tipo 61 is 6,757,800 N.
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References
 "Physics for Scientists & Engineers with Modern Physics"; Douglas C. Giancoli; 2008
 Sports Car Digest: Maserati Tipo 61 Birdcage  Car Profile
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