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Newton's Law of Gravitation

A comet orbit...

Question

A comet orbits Sun in a highly elliptical orbit. The comet has a constant

A

Speed

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B

Angular speed

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C

Angular momentum about Sun

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D

Potential energy

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Solution

The correct option is C Angular momentum about Sun
Torque about Sun is zero.
$τ = \frac{d L}{d t}$ but force passes through Sun hence $τ = 0 s o, L = c o n s t a n t$

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