PUCK COMISION Two pucks with the same mass m = 5 kg are moving on a frictionless surface as shown in the image below. Before the collision, puck 1 is traveling at a speed of 10 m/s. Puck 2 travels at an unknown speed v before the collision. After the collision, the two pucks stick together and travel in the +x direction at an unknown speed Vf. V = 10 m/s +8 Vf 0 = 45 2 V2 a) What is the initial speed of puck 2 (v2)? b) What is the final speed of the two pucks moving together after the collision (V+)?