posted by Michelle .
Suppose a 28.5 kg object is moving at 38.4 m/s along the x-axis just before it strikes a stationary 13.0 kg object. After the collision, the 28.5 kg object is moving with a velocity of 20.0 m/s at an angle of 5.79 degrees relative to the x-axis. What is the magnitude of the new velocity of the 13.0 kg object just after collision? (Hint: In order to solve this problem you will have to consider conservation of momentum in both the x-direction and the y-direction.)