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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 piece of marble is projected from the earth’s surface with velocity of 50 m/s
- If two slits in Young’s experiment are 0.4 mm apart and fringe width on a screen
- ₉₂U²³⁵ undergoes successive disintegrations with the end product of ₈₂P²⁰³
- Two strings A and B, made of same material are stretched by same tension
- Photon of frequency ν has a momentum associated with it. If c is the velocity
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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