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6. If a planet existed whose mass and radius were both half of that of earthwhat would be the acceleration due to gravity at the surface of the planetIn terms of that on the surface of earth?3M

Answer»

For earth, g = GM/R^2

For the other planet,m = M/2r = R/2

g' = GM/r^2 = G(M/2)/(R/2)^2g' = 2 GM/R^2g' = 2g

Thus the acceleration due to gravity on that planet will be twice of earth; that means 19.6 m/s^2



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