Gravitation: JEE Main 2020 Physics question

JEE Main 2020 · 6 Sep, Evening shift · Q7229

JEE Main 20206 Sep, Evening shiftPhysicsHardGravitation159× since 2002

Two planets have masses M and 16 M and their radii are

a

and 2

a

, respectively. The separation between the centres of the planets is 10

a

. A body of mass m is fired from the surface of the larger planet towards the smaller planet along the line joining their centres. For the body to be able to reach at the surface of smaller planet, the minimum firing speed needed is :

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JEE Main 2020 Gravitation Question with Solution (6 Sep Evening shift, Q7229) | JEE Arc