Rodney is trying out one of santa's new games that consists of three pieces that blow apart if the wrong key is inserted into the door. the elf picks the wrong key and the board explodes. one piece of mass 2 kg goes off at an angle of 60° from the horizon at 10 m/s. a second piece of mass 1.2 kg travels at an angle of 180° and is moving at 15 m/s.

a) find the momentum of the third piece.

b) find the velocity of the third piece if it's mass is 3 kg.