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Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
हिन्दीGiven below are two statements: Statement I: The centre of mass of a system of particles moves as if all the mass of the system was concentrated at that point and all external forces were applied there. Statement II: Internal forces between interacting particles within an isolated system can alter the total linear momentum of the system. In the light of the above statements, choose the most appropriate answer from the options given below:
Correct answer · Option 3
Statement I is correct but Statement II is incorrect.
Explanation
Statement I is the exact statement of Newton's second law for a system of particles. Statement II is incorrect because internal forces cancel in pairs and cannot change the total momentum.
