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If there are no external forces, the cen...

If there are no external forces, the centre of mass of a double star moves like a free particle.
If we go to the centre of mass frame, then we find that the two starts are moving in a circle about the centre of mass, which is at rest.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
(b) In our frame of reference, the trajectories of the starts are a combination of
(i) Uniform motion in a straight line of the centre of mass and.
(ii) circular orbits of the starts about the centre of mass.
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