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1) A 2.0 kg steel ball rolling at 5.0 m/s [W] strikes a second steel ball of equal mass at rest. After a the collison, the first ball is deflected [N35W] at 3.0 m/s. Determine the velocity (and direction) of the second ball. (the answer in the back of the book is 4.1 m/s [s37w], but i got something different) thanks!