If the net force acting on the system of particles is zero, then which of the following may varya)moment of inertiab)Kinetic energy of the systemc)velocity of centre of massd)position of centre of massCorrect answer is option 'D'. Can you explain this answer?

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Class 11 Exam > Class 11 Questions > If the net force acting on the system of part...

If the net force acting on the system of particles is zero, then which of the following may vary

a)
moment of inertia
b)
Kinetic energy of the system
c)
velocity of centre of mass
d)
position of centre of mass

Correct answer is option 'D'. Can you explain this answer?

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If the net force acting on the system of particles is zero, then which...

Correct answer is B . because when a=0 then v=constant hence K.E. will be constant and position of com will vary

Answered by Tarun Kaushik · View profile

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If the net force acting on the system of particles is zero, then which...

Given that the net external forces acting on the system of particles is zero. That is, the sum of all forces acting on the body is zero.
There may be various forces acting on a body like the gravitational force, frictional force and forces due to electric field, gravitational field etc. Here the sum of various forces acting on the body is zero. Hence we can say that the acceleration acting on the body is zero according to Newton’s second law. Thus the velocity remains constant here. As the velocity is constant momentum also remains constant as it is the product of mass and velocity.
But for a system of particles the net force acting on it is zero. Then the acceleration on the body will be zero. The velocity of particles other than the centre of mass is not zero because of internal forces. But the velocity of the centre of mass is constant.
Initially the particle is at rest. Hence it requires some external force to start its motion. But if it is moving with uniform velocity and the net external force is zero. Then the acceleration acting on the body is zero. Hence it continues its motion with constant velocity. That means, it changes its position with varying time.

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If the net force acting on the system of particles is zero, then which of the following may varya)moment of inertiab)Kinetic energy of the systemc)velocity of centre of massd)position of centre of massCorrect answer is option 'D'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about If the net force acting on the system of particles is zero, then which of the following may varya)moment of inertiab)Kinetic energy of the systemc)velocity of centre of massd)position of centre of massCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If the net force acting on the system of particles is zero, then which of the following may varya)moment of inertiab)Kinetic energy of the systemc)velocity of centre of massd)position of centre of massCorrect answer is option 'D'. Can you explain this answer?.

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