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Two steel blocks glide without friction on a surface horizontal with the speeds shown in the figure. If it is observed that after impact the velocity of block B is 10.5 ft / s toward on the right, determine the coefficient of restitution between the two blocks.

10 ft/s
6 ft/s
1.5 lb
0.9 lb
A
В
Figura P13.157 y P13.158

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