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An object of mass M(1) moving horizontal...

An object of mass `M_(1)` moving horizontally with speed u collides elastically with another object of mass `M_(2)` at rest. Select correct statement.

A

The momentum of system is consered only in direction PQ

B

Momentum of `M_(1)` is conserved in direction perpendicular to SR

C

Momentum of `M_(2)` will change in direction normal to CR

D

All of these

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The correct Answer is:
B
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