Physics · LAWS OF MOTION

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Internal forces acting between different interacting particles of a system can alter the total linear momentum of the system. Reason (R): According to Newton's third law of motion, internal forces always occur in equal and opposite pairs, so their net vector sum within the system is zero. In the light of the above statements, choose the correct answer from the options given below:

1. A
   Both (A) and (R) are true and (R) is the correct explanation of (A).
2. B
   Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
3. C
   (A) is true but (R) is false.
4. D
   (A) is false but (R) is true.