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To calculate the distance an object will fall in a given time(considering just the effects of gravity) multiply average velocity by the length of tim the object fell at that average velocity. Since velocity is increasing at a constant rate, average velocity can be found by adding initial velocity to final velocity, and dividing by two.

distance = time x (initial velocity + final velocity) / 2

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The Drop Zone Stunt Tower at Paramounts Great America is the worlds tallest free fall ride at 224 feet. Considering just the effects of gravity, about how long would it take a car to fall that distance?
A. 2.1 sec.
B. 2.9 sec.
C. 3.9 sec.