You can perform a popular trick by dropping a dollar bill (lengthwise) through t

Question

You can perform a popular trick by dropping a dollar bill (lengthwise) through the thumb and forefinger of a fellow student. Tell your fellow student to grab the dollar bill as fast as possible, and he or she can have the dollar if able to catch it. Is this proposal a good deal? Justify your answer. You can perform a popular trick by dropping a dollar bill (lengthwise) through the thumb and forefinger of a fellow student. Tell your fellow student to grab the dollar bill as fast as possible, and he or she can have the dollar if able to catch it. Is this proposal a good deal? Justify your answer.

Explanation / Answer

Yes , as an average human it is a good deal

Assuming dollar length = 15.7 cm

Average human reaction time = 0.20 sec

S = 0.5*a*t^2

0.157 = 0.5*9.81*t^2

T = 0.18 s

So, as an average human it is a good deal.

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