A 0.160-kg hockey puck is moving on an icy frictionless, horizontal  surface. At t=0, the puck is moving to the right at 3.00 m/s. (a) Calculate the velocity of the puck (magnitude direction) after a  force of 25.0 N directed to the right has been applied for 0.050s.  (b) If, instead, a force of 12.0N directed to the left is applied from from t=0 to t=0.050s, What is the final velocity of the puck?

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