| ⇦ | 
| ⇨ |
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:
- IF A⃗ and B⃗ are two vectors and θ is the angle between them
- If the temperature of the sun were to increase from T to 2T and its radius from R and 2R
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- A uniform rope of length 12 m and mass 6 kg hangs vertically from a rigid support.
- The half-life of radioactive element is 600 yr. The fraction of sample
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