Speed of joined trucks immediately after collision
Two ice-fishermen are driving trucks across a frozen and frictionless lake. Truck 1 (m1 = 1070kg) is traveling with a speed of 19.9m/s in a direction of 42.4 degrees SOUTH of EAST. Truck 2 (m2 = 850kg) is traveling due NORTH with a speed of 17.8m/s. The trucks collide and lock into a single unit. What is the speed of the joined trucks immediately after the collision?