JEE Main Physics question
Statement 1: The rate of change of total momentum of a many-particle system is proportional to the sum of the internal forces of the system. Statement 2: Internal forces can change the kinetic energy but not the momentum of the system.
Answer: (D)
Solution
By Newton's third law, internal forces occur in equal-and-opposite pairs and cancel out in the total; the rate of change of total momentum depends only on the external forces, not the
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