AP EAMCET · PHYSICS · Center of Mass Momentum and Collision
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 \(2 v\), the speed of centre of mass \((\mathrm{CM})\) is
- A Zero
- B \(v\)
- C \(2.5v\)
- D \(4v\)
Answer & Solution
Correct Answer
(A) Zero
Step-by-step Solution
Detailed explanation
As initially both the particles were at rest therefore velocity of centre of mass was zero and there is no external force on the system so speed of centre of mass remains constant \(i e\), it should be equal to zero.
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