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Gravitational field ia uniform, the gravitational PDface of a planet and point 100 m aboveKg. The work done in moving a mass50 J/5 kg from surface to a point 10 m above is1)5 J2) 25J3)2.5J4) 50 J |
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Answer» The potential per unit mass is: U/m = a·h 50 joule/kg = a·(100 m) 1/2 joule/kg-m = a Work to lift a mass m to a height h is: W = F·d = ma·h m = 5 kg a = 1/2 m/s2 h = 10 m W = 25 J |
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