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g1 and g2 denote acceleration due to gra...

`g_1` and `g_2` denote acceleration due to gravity on the surface of the earth and on a planet, whose mass and radius are twice that of the earth. Then,

A

`g_1=g_2`

B

`g_1=2g_2`

C

`2g_1=g_2`

D

`g_1=2g_2^2`

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