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Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be:
Options
(a) 2v
(b) zero
(c) 1.5
(d) v
Correct Answer:
zero
Explanation:
If no external force actson a system of particles, the centre of mass remains as rest. So, speed of centre of mass is zero.
Related Questions: - A magnetic force acting on a charged particle of charge -2µC in a magnetic field of 2T
- A long straight wire carries a certain current and produces a magnetic field
- The surface tension of a liquid is 5 newton per metre. If a film
- A string is stretched between fixed points seperated by 75 cm. It is observed
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Topics: Motion of system of Particles and Rigid Body
(73)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A magnetic force acting on a charged particle of charge -2µC in a magnetic field of 2T
- A long straight wire carries a certain current and produces a magnetic field
- The surface tension of a liquid is 5 newton per metre. If a film
- A string is stretched between fixed points seperated by 75 cm. It is observed
- If a solid sphere of mass 1 kg and radius 0.1 m rolls without slipping at a uniform
Topics: Motion of system of Particles and Rigid Body (73)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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