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# Edexcel M2: Coefficient of Restitution watch

1. A particle A of mass 4m moves with speed collides directly with a particle B of mass m which is at rest on a smooth horizontal table. The coefficient of restitution between the particles is . Given that there are no further collisions, find the range of possible values for e.
Using conservation of momentum:

Coefficient of restitution:

Where do I go from here...?
2. (Original post by Patent Pending)
Using conservation of momentum:

should be
Coefficient of restitution:

should be 6u=...
should be /3u
Where do I go from here...?
find equations for va and vb in terms of u and solve vb>va
3. Is it necessary to retain the 'u's (or the 'm's)? Normally I find that these can be omitted..
4. it will be very hard to get equations of va and vb in terms of u if you omitt u in the only two equations you have lol

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Updated: April 15, 2008
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