ycr007 wrote:CtrlAltDel wrote:ycr007 wrote:CtrlAltDel wrote: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?
Don't think this is a foolish question... The answer to it is very logical...
must be a Polar Bear....Hence White.......
y?
Coz the data when put into equatiosn show that the "g" at that spot
is Equal to 9.81 m/s^2 or nearly 10 .....and that occurs at the Poles only
Hence it is a Polar Bear...
BTW it is the 350th Reply to this thread
...and the right reply too!
the answer is derived as below:
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.
09. This can happen only at the poles .. (North or South)
10. Bears are found only at the North Pole.
