Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. If the gravitational force of attraction between planet and star is proportional R-(5/2)to , then T2 is proportional to
(a) R3 (b)R7/2
(c) R5/2 (d) R3/2
Answer: b
(16)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)