| ⇦ | 
| ⇨ |
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.
Related Questions: - The de-Broglie wavelength of neutron in thermal equilibrium at temperature T is
- A piece of iron is heated in a flame. It first comes dull red then becomes reddish
- The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated
- You are marooned on a frictionless horizontal plane and cannot exert any horizontal
- The focal length of the objective of a terrestrial telescope is 80 cm
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 de-Broglie wavelength of neutron in thermal equilibrium at temperature T is
- A piece of iron is heated in a flame. It first comes dull red then becomes reddish
- The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated
- You are marooned on a frictionless horizontal plane and cannot exert any horizontal
- The focal length of the objective of a terrestrial telescope is 80 cm
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
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply