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## Main Question or Discussion Point

Consider a particle with velocity "v" has the collision with a rotating disc.

How can I analyze the final angular velocity this system?

If the mass of particle is very negligible related to the mass of rotating disc, definitely particle will turn back after collision. In this case, how can I calculate final velocity of particle after collision and also new direction of particle?

Thanks in advance for your cooperation

How can I analyze the final angular velocity this system?

If the mass of particle is very negligible related to the mass of rotating disc, definitely particle will turn back after collision. In this case, how can I calculate final velocity of particle after collision and also new direction of particle?

Thanks in advance for your cooperation