A 0.320 kg puck at rest on a horizontal frictionless surface isstruck by a 0.220 kg puck moving in the positive x direction with aspeed of 4.05 m/s. After the collision, the 0.220 kg puck has aspeed of 1.29 m/s at an angle of ? = 60.0° counterclockwise fromthe positive x axis.
(a) Determine the velocity of the 0.320 kg puck after thecollision. Express your answer in vector form.
vf = ___m/s
(b) Find the percent of kinetic energy lost in thecollision.
100*?K/Ki = ___%
