two batting robot sliding on a frictionless surface. Robot A, with a mass 20 kg, initially moves at 2.0 m/s parallel to the x-axis. It collides with robot B, whch has a mass of 12 kg and is initially set to rest. After the collision, robot A is moving 1.0 m/s in a direction that makes an angle of approximately 30 degrees with its initial direction. What is the final velocity of robot B?