When using a chair as an improvised weapon, what biomechanical principle maximizes its effectiveness?

When using a chair as an improvised weapon, the biomechanical principle that maximizes its effectiveness is maximizing the lever arm and applying focused force. A chair, with its legs and back, provides a significant lever arm that can amplify the force generated by your body. By gripping the chair firmly and using a swinging motion, you can generate substantial momentum and deliver a powerful blow. Focusing the force on a specific point, such as the chair leg impacting a vulnerable area like the head or limbs, concentrates the energy and increases the likelihood of causing pain, injury, or loss of balance. For example, gripping the chair by the back and swinging it so that a chair leg impacts the opponent's head utilizes the full length of the chair as a lever, maximizing the force of impact. This lever action, combined with focused targeting, makes the chair a more effective weapon than simply throwing it or using it for blunt force impact.