This unit introduces biomechanical concepts applicable to the study of exercise and sports science, focusing upon external forces and their effects on the body and its movement. Biomechanics includes the study of kinematics and kinetics. Kinematics is the description of motion and encompasses concepts such as displacement, velocity and acceleration of rigid and biological systems. Kinetics provides an explanation of the cause of motion due to the effects of forces and includes concepts such as force, inertia, stability, momentum, work and power. Laboratory classes introduce students to the applications of biomechanics for the physical educator, coach and exercise or sports scientist.