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Three particles  and  of equal masses move with equal speeds along the medians of an equilateral triangle. They collide at the centroid  of the triangle. After collision comes to rest while  retraces its path with speed  The velocity of  is then

a)

 direction

b)

 direction

c)

2  direction

d)

 direction



Question ID - 100201 | SaraNextGen Top Answer

Three particles  and  of equal masses move with equal speeds along the medians of an equilateral triangle. They collide at the centroid  of the triangle. After collision comes to rest while  retraces its path with speed  The velocity of  is then

a)

 direction

b)

 direction

c)

2  direction

d)

 direction

1 Answer
127 votes
Answer Key / Explanation : (d) -

(d)

Initial momentum of the system is zero. So,final momentum should also be zero. Finally,  comes to rest after collision so to have final momentum zero, and  should move in opposite directions

127 votes


127