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Perfectly Elastic Collision

An object of ...

Question

An object of mass $m_{1}$ moving horiozntally with speed $u$ collides elastically with another object of mass $m_{2}$ at rest. Select correct statement.

A

The momentum of the system is conserved only in direction

P Q

.

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B

Momentum of

m_{1}

is conserved in direction perpendicular to

S R

.

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C

Momentum of

m_{2}

will change in direction normal to

C R

.

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D

All of these.

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Solution

The correct option is B Momentum of $m_{1}$ is conserved in direction perpendicular to $S R$ .
As, we know linear momentum of individual particles remains unchanged along common tangent direction. Here, common tangent direction is perpendicular to the $S R (which is common normal)$ .

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Standard XII Physics

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