Question
Question: The two particle X and Y, initially at rest, start moving towards each other under mutual attractiio...
The two particle X and Y, initially at rest, start moving towards each other under mutual attractiion. If at any instant the velocity of X is V and that of Y is 2V, the velocity of their centre of mass will be:
A
0
B
Va
C
2 V
D
V/2
Answer
0
Explanation
Solution
Initially both the particles were at rest so . As external force on the system is zero therefore velocity of centre of mass remains unaffected.