Rotational Motion Question 173
Question: 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
Show Answer
Answer:
Correct Answer: B
Solution:
[b] If no external force acts on a system of par- ticles, the centre of mass remains at rest.
So, speed of centre of mass is zero.
