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JEE Main202117 Mar 2021Morning ShiftPhysicsGravitationActual

The radius in kilometer to which the present radius of earth ( R = 6400 km ) to be compressed so that the escape velocity is increased 10 time is _______.

Correct answer

0

Step-by-step solution

V e = 2 G m R   … 1 10   V e = 2 G m R '   … 2 ∴ 10 = R R ' ⇒ R ' = R 100 = 6400 100 = 64   km

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