Complex sentence: Often the term vectorial mechanics is applied to the form based on Newton's work, to contrast it with analytical mechanics which uses two "scalar" properties of motion, the kinetic and potential energies, instead of vector forces, to analyze the motion.
Split into simpler sentences: Often the term vectorial mechanics is applied to the form based on Newton's work, to contrast it with analytical mechanics. This distinction makes sense because analytical mechanics uses two "scalar" properties of motion, the kinetic and potential energies, instead of vector forces, to analyze the motion.