Gravitation Question 304

Question: If the distance of earth is halved from the sun, then the no. of days in a year will be

Options:

A) 365

B) 182.5

C) 730

D) 129

Show Answer

Answer:

Correct Answer: D

Solution:

  • From Kepler’s law of periods, $ [T_{2}=T_{1}{{\left( \frac{R_{2}}{R_{1}} \right)}^{3/2}}=365{{\left( \frac{/2}{{}} \right)}^{3/2}}] $ $ [=365\times \frac{1}{2\sqrt{2}}=129,days] $


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