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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.
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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 particle has initial velocity (3i + 4j) and acceleration (0.1 i+0.3j). It’s speed after 10s
- A liquid boils when its vapour pressure equals
- Planck’s constant has same dimensions as those of
- A toroid having 200 turns carries a current of 1 A. The average radius of the toroid
- A body starts from rest with an acceleration of 2 m/s². After 5 second,
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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