Question

# Two perfectly elastic particles P and Q of equal mass travelling along the line joining them with velocities 15 m/sec and 10 m/sec. After collision, their velocities respectively (in m/sec) will be

A
0,25
B
5,20
C
10,15
D
20,5

Solution

## The correct option is B $$10, 15$$For a collision between two identical perfectly elastic particles of equal mass, velocities after collision get interchanged.Physics

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