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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
- The thermo e.m.f. E in volts of a certain thermocouple is found to vary
- In an A.C circuit of capacitance the current from potential is
- Which of the following combinations should be selected for better tuning of an L-C-R
- Two conducting spheres of radii 5 cm and 10 cm are given a charge of 15 μC each.
- The horizontal range and maximum height of a projectile are equal.The angle of projection
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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