A) less than 11.2
B) more than 11.2
C) 11.2 km/s
D) None of these
Correct Answer: C
Solution :
Escape velocity \[{{v}_{e}}=\sqrt{2g{{R}_{e}}}=\sqrt{\frac{2GM}{{{R}_{e}}}}\]where g = acceleration due to gravity, \[{{R}_{e}}=\] = radius of the earth, G = gravitational constant and M = mass of the earth. Therefore, escape velocity do not depend on the mass of the object to be escaped. Hence, escape velocity for the elephant is also\[11.2\text{ }km/s\].
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