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 and direction) after a force of 25.0 N directed to the right has been applied for 0.050 s.
b. If, instead, the force of 25.0 N is directed to the left for 0.050 s, calculate the final velocity of the puck.