Gravitation - Result Question 5

5. The distance of Neptune and Saturn from the sun is nearly 1013 and 1012 meter respectively. Assuming that they move in circular orbits, their periodic times will be in the ratio

(a) 10

(b) 100

(c) 1010

(d) 1000

[1994]

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Answer:

Correct Answer: 5. (c)

Solution:

  1. (c) T2R3 (According to Kepler’s law)

T12(1013)3 and T22(1012)3

T12T22=(10)3 or T1T2=1010



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