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A body weighs 5.6kgwt on the surface of the Earth.How much will be it's weight on a planet whose mass is 1/7th mass of the Earth and radius twice that of Earth's radius. |
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Answer» Answer: 0.2 N Explanation: MASS of Earth = M Mass of unknown planet = M' = M/7 Radius of earth = R Radius of unknown planet = R' = 2R Acceleration DUE to earth's gravity = g Acceleration due to unknown planet's gravity = g' Acceleration due to gravity at unknown planet is g' = GM'/R'² = G (M/7) / (2R)² = GM/(28 R²) = g/28 Mass of BODY = 5.6 / g Weight of body on unknown planet = MG' = 5.6/g × g/28 = 0.2 N |
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