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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 ray of light travelling in a transparent medium of refractive index µ, falls on surface
- To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA
- A parallel plate capacitor is charged and then isolated. The effect of increasing
- A galvanometer has a resistance 50Ω. A resistance of 5Ω is connected parallel to it.
- A source and an observer approach each other with same velocity 50 m/s. If the frequency
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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