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Topic review (newest first)
One further thought.
and after the wall impact
Express all in terms of u_a
Let D be the distance from the wall for second impact
Back later when I've found some more paper to work this out.
A LITTLE LATER:
Curious. I'm getting
which agrees with your numeric version.
'A small smooth sphere moves on a horizontal table and strikes an identical sphere lying at rest on the table at a distance d from a vertical wall, the impact being along the line of centres and perpendicular to the wall. Prove that the next impact between the spheres will take place at a distance