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The acceleration due to gravity on a planet is same as that on earth and its radius is four times that of earth. What will be the value of escape velocity on that planet if it is

The acceleration due to gravity on a planet is same as that on earth and its radius is four times that of earth. What will be the value of escape velocity on that planet if it is  ve on earth

(a)  ve                        (b) 2  ve

(c)  4 ve                  (d)  ve /2

Answer: b

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