Two planets have the same average density but their radii are R1 and R2 . If acceleration due to gravity on these planets be g1 and g2 respectively, then
(a) g1/g2 = R1/R2 (b) g1/g2 = R2/R1
(c) g1/g2 = R12/R22 (d) g1/g2 = R1 3/R2 3
Answer: a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a