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NEET 2010
Exam
NEET
Year
2010
Subject
Physics
Chapter
Center of Mass, Momentum and Collision

NEET 2010 · Physics · Center of Mass, Momentum and Collision

Two particles which are initially at rest, move towards each other...

Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v\mathrm{v} and 2v2 \mathrm{v} at any instant, then the speed of centre of mass of the system will be

Options

  1. A2v2 \mathrm{v}
  2. B0
  3. C1.5v1.5 \mathrm{v}
  4. Dv\mathrm{v}

Correct answer

B. 0

Step-by-step solution

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 iei e, it should be equal to zero.
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