Assertion: The centre of mass of an isolated system has a constant velocity. Reason: If centre o....

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Assertion: The centre of mass of an isolated system
\( \mathrm{P} \)
has a constant velocity.
W
Reason: If centre of mass of an isolated system is already at rest, it remains at rest.
(1) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(2) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(3) Assertion (A) is true and Reason (R) is false.
(4) Assertion (A) and Reason (R) both are false.


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