A 0.32-kg puck at rest on a horizontal frictionless surface is struck by a 0.22-kg puck moving in the positive x-direction with a speed of 6.8 m/s. After the collision, the 0.22-kg puck has a speed of 1.6 m/s at an angle of θ = 60° counterclockwise from the positive x-axis.

(a) Determine the velocity of the 0.32-kg puck after the collision.

magnitude	m/s
direction

(b) Find the percent of kinetic energy lost in the collision