Acceleration due to gravity at surface of a planet is equal to that of at surface of earth of surface of earth and density is 1.5 times that of earth. If radius of earth is R then radius of planet is what ????
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The value of acc due to gravity at surface of planet is,
g = (4pi×GRd)/3.
where R be radius of planet and d be the density.
Since g is same for both planets. so
Rd = R’d’
Rd= R’(1.5d)
or R’ = 2R/3.
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