Two perfectly elastic particles A and B of equal masses travelling along the line joining them with velocity 15 ms $^{- 1}$ and 10 ms $^{- 1}$ respectively collide. Their velocities after the elastic collision will be (in ms $^{- 1}$ ) respectively :

20 and 5

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10 and 15

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25 and 20

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0 and 25

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Solution

The correct option is A 10 and 15
Collision between two perfectly elastic particles with different velocities will interchange after collision. Hence, velocities of A and B after the elastic collision will be $10 m s^{- 1}$ and $15 m s^{- 1}$ respectively.

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Two perfectly elastic particles A and B of equal masses travelling along the line joining them with velocity 15 ms−1 and 10 ms−1 respectively collide. Their velocities after the elastic collision will be (in ms−1) respectively :

The correct option is A 10 and 15Collision between two perfectly elastic particles with different velocities will interchange after collision. Hence, velocities of A and B after the elastic collision will be 10ms−1 and 15ms−1 respectively.

Two perfectly elastic particles A and B of equal masses travelling along the line joining them with velocity 15 ms $^{- 1}$ and 10 ms $^{- 1}$ respectively collide. Their velocities after the elastic collision will be (in ms $^{- 1}$ ) respectively :

The correct option is A 10 and 15
Collision between two perfectly elastic particles with different velocities will interchange after collision. Hence, velocities of A and B after the elastic collision will be $10 m s^{- 1}$ and $15 m s^{- 1}$ respectively.