Physics · Gravitation

Two planets have masses M and 16M and their radii are a and 2a, respectively. The separation between the centers of the planets is 10a. A body of mass m is fired from the surface of the larger planet towards the smaller planet along the line joining their centers. For the body to be able to reach the surface of the smaller planet, the minimum firing speed needed is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Correct answer

(3/2)√(5GM/a)

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