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Four particles A,B,C and D of equal mass move with equal speed v along the diagonals of a square in a horizontal plane. After the collision, A comes to rest while B and C retrace their paths with same speeds. Then the particle D will (a)continue to move along the same line with speed v (b)retrace its path with speed 2v (c)come to rest (d)move with speed v*root2 alnd a line parallel to CD

Four particles A,B,C and D of equal mass move with equal speed v along the diagonals of a square in a horizontal plane. After the collision, A comes to rest while B and C retrace their paths with same speeds. Then the particle D will
(a)continue to move along the same line with speed v
(b)retrace its path with speed 2v
(c)come to rest
(d)move with speed v*root2 alnd a line parallel to CD 

Grade:11

2 Answers

Vikas TU
14149 Points
7 years ago
Conserve the momentum in x-direction and y-direction for each masses respectively.
And U would get the relation.
 
In x direcn. the Vd = 2v i cap.
find similarly in y-direcn.
Divya
14 Points
7 years ago
Can you please solve the question fully and post the answer?
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