Chapter 3 - Kinetic concepts for analyzing human motion. In this chapter, you will learn to: Define and identify common units of measurement for mass, force, weight, pressure, volume, density, specific weight, torque, and impulse; identify and describe the different types of mechanical loads that act on the human body; identify and describe the uses of available instrumentation for measuring kinetic quantities; distinguish between vector and scalar quantities; solve quantitative problems involving vector quantities using both graphic and trigonometric procedures.