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Question

The masses of two planets are in the ratio 1: 2. Their radii are in the ratio 1: 2. The acceleration due to gravity on the planets is in the ratio.



A

1: 2

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B

2: 1

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C

3: 5

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D

5: 3

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Solution

The correct option is B

2: 1


 g = GMR2

So, g1 = GM1R12​ and g2 = GM2R22​​ and it’s given that M2​ = 2M1​  and R2​=2R1​,

After substituting these in the expression, we'll get,  g1g2​ = 2: 1   


Physics

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