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1.If the radius of a planet becomes half where as its mass remain unchanged then g becomes? 2.Orbital radius of a satellite S of earth is four times that

of a communication satellite C. Period of revolution of S is?


Since , g = GM/R²

so g ∝ 1/R²

since Radius becomes half then g will increase twice
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Wrong ans!!
Yeah its square , i unnoticed it , it will become 4 , thnx :)
You're welcome :)
g = GM/R² 
If Radius becomes half (R/2)
g' = GM / (R/2)² 
   = 4 GM / R²
   = 4 g 
So, If the radius becomes half then g becomes 4 times.
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Hope it helps :) & if it does please mark as best ^_^
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