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A proton of mass m moving with a speed of 2.5×106 m/s undergoes a head-on elastic collision with an alpha particle of mass 4m, which is initially at rest. What is the speed of the proton after the collision?

  • Phy. - ,

    I would use conservation of momentum here. Then, conservation of energy. You will have two equations, two unknowns. Use substitution. THere is a little algebra involved.

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