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Q: Bear fell into a pit trap depth of 19 617 meters. The time of his fall was 2 seconds. What color was the bear?
A. White (polar bear)
B. Brown
C. Black
D. Black-Brown (Malay Bear)
E. Gray (Grizzly)





Solution: Using the formula S = gt2 / 2, we calculate that g = 9, 8085 m / s2 (acceleration due to gravity). Many think that this is the acceleration of gravity at the poles. They are mistaken, because g at ​​the North Pole is 9, 832, which exceeds the value we received. And at the equator g equals 9, 780. Looking at the table of values, we see that the desired acceleration can be achieved at 44 ° latitude. Since in the southern hemisphere at this bears no parallel, the habitat of the bears we need is 44 ° north latitude. The problem is said that the bear fell into the pit trap, and this means that the hole was large enough to accommodate it. On land inhabited by not many more animals bear, so this trap was made especially for the bears. In addition, since trap was on the ground, we can be sure that this is the land bear, because Most species of land bears have poor eyesight, so worse distinguish traps. In this case, the only options B and C may be true. Hole depth of 19 617 meters, you can easily dig only in the soft soil. Brown bears usually live on the hills and in the mountain forests. They are ferocious animals and the risk of hunting for them - great. But they are less valued than black bears. So for bear paws and bile are used mainly black bears. Since habitat of the two species do not match, then we can conclude that the correct option C.