Momentum, Impulse & Collisions Explained | Chapter 8 of University Physics
Momentum, Impulse & Collisions Explained | Chapter 8 of University Physics Chapter 8 of University Physics delves into linear momentum, impulse, and the conservation of momentum—which holds even in high-speed or variable-mass scenarios. You’ll learn how to analyze collisions, track a system’s center of mass, and apply momentum concepts to rocket propulsion. Momentum & Impulse Linear momentum ( p ) is defined as p = m v and is conserved in any isolated system. As a vector, its direction matches that of velocity. Impulse ( J ) quantifies how force applied over time changes momentum: J = F Δt for constant force J = ∫ F dt for variable forces Impulse–momentum theorem: J = Δp = p₂ – p₁ Conservation of Momentum & Collisions When net external force is zero, total momentum before equals total momentum after. This principle applies across dimensions—each component ( x, y, z ) conserves separately. Collisions fall into three categories: Elastic : both m...