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laf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400kg that is traveling horizontally at 11.5m/s . Olaf's mass is 65.2kg.
If the ball hits Olaf and bounces off his chest horizontally at 7.00m/s in the opposite direction, what is his speed vf after the collision?
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