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/r^{2}=10m/s^{2}

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

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