posted by Kellie .
A 3.0kg object originally at rest explodes and splits into three fragments. One fragment has a mass of .50kg and flies off along the negative x-axis at a speed of 2.8m/s, and another has a mass of 1.3kg and flies off along the negative y-axis at a speed of 1.5m/s. What are the speed and direction of the third fragment?
Whatever it takes to make the vector sum of the thee fragment moments equal to zero.
The mass of the third fragment is 1.2 kg.