Please show your work.
1. An object explodes and a 2.0 kg piece moves north at 4.0 m/s and a 4.0 kg piece moves east at 1.5 m/s.
1.) What is the momentum of the third piece?
2.)What is the mass of the third piece if it moves at a speed of 4.0 m/s?
2.A ball collides with another ball at rest. After the collision, the 1.0 kg ball moves away with a velocity of 2.0 m/s at an angle of 60°. The 0.50 kg ball rolls at 3.0 m/s at an angle of 135°. What was the momentum of the first ball (1.0 kg ball) before collision?