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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Gravitation
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For a planet moving aroung the sun in an elliptical orbit, which of the following quantities remain constant?

1) Total energy of the sun-planet system

2) The angular momentum of the planet about the sum

3) The force of attraction between the two

4) Linear momentum of the planet

$\begin{array}{1 1}(a)\;1,2\\(b)\;3,4\\(c)\;1,2,3\\(d)\;1,4\end{array} $

Can you answer this question?

1 Answer

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Total energy of the planet-sun system and the angular momentum of the planet remain constant. But force of attraction and linear momentum are not constant.
Hence a is the correct answer.
answered Aug 9, 2013 by meena.p
edited Apr 2, 2014 by balaji.thirumalai

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