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Question

A particle of mass M moves along the X-axis with speed V0 and collides and sticks to a particle of mass m moving with a speed V0 along y-axis. The velocity of the combined particle after the collision :

A
M^i+m^j(M+m)V0
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B
m^i+M^j(M+m)V0
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C
(m^i+M^j)V0
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D
Zero
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Solution

The correct option is A M^i+m^j(M+m)V0
Applying conservation of linear momentum,

MV0^i+mV0^j=(M+m)v

v=MV0^i+mV0^jM+m

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