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Conservation of Momentum

Three particl...

Question

Three particles $A, B$ and $C$ of equal mass $m$ , move with equal speed $v$ along the medians of an equilateral triangle as shown in the figure. They collide at the centroid $G$ of the triangle. After collision, $A$ comes to rest and $B$ retraces its path with speed $v$ . What is the speed of $C$ after collision?

A

0

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B

\frac{v}{2}

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C

v

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D

2 v

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Solution

The correct option is C $v$

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