Two stars of masses 3 x 10 31 kg each, and at distance 2 x 10 11 m rotate in a plane about their common center of mass O. A meteorite passes through O moving perpendicular to the stars' 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 x 10 -11 N m 2 kg -2 )
Text Solution
Verified by ExpertsThe correct answer is:
C
2.8 x 10 5 m s -1
To escape, the total energy of small particle must be zero.
TE=KE+U
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