MHT CET 2026 Physics question
The masses and radii of the earth and moon are M, R and M, R and respectively, Their centres are at a distance 'd' apart. The minimum speed with which body of mass 'm' should be projected from a distance 2d/3 from the centre of M so as to escape to infinity is
Answer: (C)
Solution
The body is on the line joining the centres at from , so it is from . The potential energy of the body is . To escape to infinity with minimum speed, the total energy must be zero:
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