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Three particl...

Question

Three particles each of mass ' $m$ ' are at the corners of an equilateral triangle. If they are all moving towards the centroid of the triangle with equal speed ' $v$ ', the magnitude of the total momentum of the system of particles is:

A

3 m v

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B

2 m v

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C

m v

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D

z e r o

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Solution

The correct option is B $z e r o$
The situation is showed in adjacent figure.
The resultant of any two momentum vector will always cancel the another.
So $Δ P = 0$ .

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