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Statement 1: If there is no external torque on the body about its centre of mass, then the velocity of the centre of mass remains constant. Statement 2: The linear momentum of the isolated system remains constant.

Statement 1: If there is no external torque on the body about its centre of mass, then the velocity of the centre of mass remains constant. Statement 2: The linear momentum of the isolated system remains constant. Correct Answer Statement 2 is true, statement 1 is false

The absence of external torque does not ensure the absence of external force. If an external force is present, then the velocity of the centre of mass will not remain constant. Thus statement 1 is false.

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