PHYSICS

1) What will be the acceleration due to gravity at a planet whose mass is 8 times the mass of earth and whose radius is twice that of earth

[g on earth = 10m/s]

let Mass of the earth be m and radius be r

g = GM/r2=10m/s2

g on other planet when mass is 8 times and radius 2 times = G*8M/(2r)2 = 8GM/4r2 = 2*10m/s2 = 20m/s2

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let Mass of the earth be m and radius be r

g = GM/r2=10m/s2

g on other planet when mass is 8 times = G*8M/r2 = 8GM/r2 = 8*10m/s2 = 80m/s2

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