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Two stars of masses 3 × 10 31 kg each, and at distance 2 × 10 11 m rotate in a plane about their common centre of mass O. A meteorite passes through O moving perpendicular to the star’s rotation plane. In order to escape from the gravitational field of this double star, the minimum speed that meteorite should have at O is - (Take Gravitational constant; G = 6.67 × 10 –11 Nm 2 kg –2 )

1. 2.4 × 10 4 m/s
2. 1.4 × 10 5 m/s
3. 3.8 × 10 4 m/s
4. 2.8 × 10 5 m/s

Correct answer: 2.8 × 10 5 m/s

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