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11. The weight of a body on the surface of the earth is 392 N. What will be the weight of this body on aplanet whose mass is double that of the earth and radius is four times that of the earth? |
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Answer» Let the mass of the body on the surface of Earth = m kgweight of the body on Earth = m * g = G M m / R² g = 9.8 m/sec² on Earth g = acceleration due to gravity = G M / R² The weight of a body on a planet is directly proportional to Mass of the planet and inversely proportional to square of radius of the planet. Therefore, weight of body on planet= 392 * 2 / (4)² Newtons = 98 Newtons |
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