After head on elastic collision between two balls of equal masses , one is observed to have a speed of $3\,\,m/s$ along positive $x-$ axis and the other has a speed of $2\,\,m/s$ along negative $x$ axis. The original velocities of the balls are
After head on elastic collision between two balls of equal masses , one is observed to have a speed of $3\,\,m/s$ along positive $x-$ axis and the other has a speed of $2\,\,m/s$ along negative $x$ axis. The original velocities of the balls are
- A
$-2\,\,m/s\,\,$ and $\,\,+3\,\,m/s$
- B
$+2\,\,m/s\,\,$ and $\,\,+3\,\,m/s$
- C
$-3\,\,m/s\,\,$ and $\,\,+2\,\,m/s$
- D
$+3\,\,m/s\,\,$ and $\,\,-2\,\,m/s$
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