Mass of moon is 1/81 times that of earth and its radius is 1/4 of the earth radius. If…
Physics · JEE Main · NTA Exams — Gravitation
Mass of moon is 1/81 times that of earth and its radius is 1/4 of the earth radius. If the escape velocity on the earth’s surface is 11.2 km/s. Then its value at the surface of moon will be
- 5 km/s
- 2.5 km/s
- 1.25 km/s
- none of these
Answer
(B) 2.5 km/s
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