Estimate the each part of following problem given below:
Problem; Two railroad freight cars with masses 130Mg and 170Mg approach with equal speeds of 0.360 m/s, they collide the lighter car rebounding opposite its original direction at 0.300m/s.
Part I: Find the velocity of the heavier car after the collision. Assume the original direction of the lighter car is positive.
Part II: What fraction of the original kinetic energy was lost in this inelastic collision?
I want you to clarify the physics in this above problem.