1.

Assertion: Two point masses freely positioned at rest move under mutual gravitational force of attraction. Velocity of C.M. of the system is zero at any instant. Reason : Gravitational force of attraction is an internal force of the system

Answer»

Both Assertion and Reason are TRUE and Reason is the correct EXPLANATION of Assertion
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
Assertion is true and Reason is FALSE
Assertion is false and Reason is true

Answer :A


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