Q: With what minimum speed should m be projected from point C in presence of two fixed masses M each at A and B as shown in the figure such that mass m should escape the gravitational attraction of A and B?
(a) $ \displaystyle \sqrt{\frac{2GM}{R}} $
(b) $\displaystyle \sqrt{\frac{2\sqrt2 GM}{R}} $
(c) $ \displaystyle 2\sqrt{\frac{GM}{R}} $
(d) $ \displaystyle 2\sqrt2 \sqrt{\frac{GM}{R}} $
Ans: (b)