Search any question & find its solution
Question:
Answered & Verified by Expert
Two particles $A$ and $B$ initially at rest, move towards each other under mutual force of attraction. At an instance when the speed of $A$ is $v$ and speed of $B$ is $3 v$, the speed of centre of mass is
Options:
Solution:
1425 Upvotes
Verified Answer
The correct answer is:
Zero
Only internal force is acting on the system. Therefore $\vec{F}_{\text {ext }}=0$. It is also given that the initial velocity of COM is zero, therefore it will remain at rest.
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.