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I am trying to find the coefficient of restitution in this example:

Block m1=2 kg is pushed with initial velocity v=7 m/s for distance

d = 4 meters towards a wall. Kinetic friction b/w floor and block is mK = 0.4. The block rebounds off the wall and travels distance

d2 = 1 m before stopping.

I think I should get the speeds of the block right before and after hitting the wall first but I am really lost on this one. Any help or teaching would be appreciated.

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# Coefficient of Restitution

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