Nisha82 thumbnail
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Posted: 20 years ago
#1
Puzzle

A bear has fallen from a height of 10 meters.
It took square-root of 2 seconds for it to fall on the ground Now can you tell me the COLOR of the bear based on this information?

Please don't think this is a foolish question...

The answer to it is very logical...



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Answer
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Let's see how the above puzzle is a logical one.

01. The bear has fallen from a height of 10 m
02. It took square root(2) sec for it to fall.
03. Obviously it's initial velocity is zero (since it's a freely falling body).
04. Let's assume the acceleration due to gravity is: 'a' meters/seconds square at that place.
05. So applying the formula.. S = ut + (1/2*a*t^2) we know... u = 0, S = 10, t = square root(2) secs Hence, 10 = 0*sqroot(2) + {(1/2) * a * 2 }
06. Solving the above equation gives a = 10 meters/seconds square
07. For a free falling body 'a' is the gravitational pull which is g=9.8 m/s^2
08. Hence at that place where the bear fell, the acceleration due to gravity is the highest (its greater than 9.8 and since wkt a)
09. This can happen only at the poles .. (North or South)
10. And we know that only polar bears can survive in the sub zero temperatures of the poles
11. And no points for guessing that the colour of a Polar bear is WHITE!!!

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