Object1 of mass 6 kg moving down at -35°C and 20 m/s collides and sticks to object2 of mass 8 kg which was initially moving up at 50o and 25 m/s. What is the final velocity of the combined objects?

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.