better get those books out Dick....here is something for you to look at.

An important difference is that momentum is a vector quantity - it has a direction in space, and momenta combine like forces do. Kinetic energy is a scalar quantity - it has no direction in space, and kinetic energies combine like " regular numbers" .

The momentum of an object is proportional to the object' s velocity - if you double its velocity, you double its momentum. The kinetic energy of an object is proportional to the square of the object' s velocity - if you double its velocity, you quadruple its velocity. This has important consequences...

more to follow......