work out in detail the situation in which a moving ball colides with stationary

Question

work out in detail the situation in which a moving ball colides with stationary ball in a totally elastic collison. Assume the balls have the same mass when doing the calculation. How does conservation of momentum show itself in this situation?

Explanation / Answer

coeffiecient of restitution=change in velocity before impact/change in velocity after impact e=v2-v1/u1-u2 1=v2-v1/u v2-v1=u-------->A masses are equal according to law of conservation of momentum, m1u1+m2u2=m1v1+m2v2 m*u+m*0=m*v1+m*v2 u=v1+v2--------->B adding A and B. 2v2=2u v2=u velocity of second mass =um/s which is initial speed of first mass,and v1=0 first mass is coming to rest for elastic collision of same massses,they simply just exchange there velocities after collision

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