KCET · Physics · Center of Mass Momentum and Collision
Two particles which are initially at rest move towards each other under the action of their
mutual attraction. If their speeds are \( v \) and \( 2 v \) at any instant, then the speed of center of mass
of the system is,
- A \( 1.5 \mathrm{v} \)
- B \( 2 \mathrm{v} \)
- C \( \mathrm{v} \)
- D zero
Answer & Solution
Correct Answer
(D) zero
Step-by-step Solution
Detailed explanation
(D)
At initial position both \( A \) and \( B \) are at rest, hence, momentum is zero. It is given that no external force isacting on them.
So, momentum remains zero. Since mass cannot be zero, therefore velocity is zero.
At initial position both \( A \) and \( B \) are at rest, hence, momentum is zero. It is given that no external force isacting on them.
So, momentum remains zero. Since mass cannot be zero, therefore velocity is zero.
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