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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 block of wood weighs 10 N and is resting on an inclined plane. The coefficient
- In Young’s double slit experiment the distance between the slits and the screen
- A condenser of 250 μF is connected in parallel to a coil of inductance of 0.16 mH
- If an electron and a positron annihilate, the energy released is
- The binding energy of deutron is 2.2 MeV and that of ₂⁴He is 28 MeV.
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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