Chapter Overview
Newton's Second Law ($F = ma$ and $a = \frac{F}{m}$) with impulse/impact duration applications (cricket catch, vehicle airbags, coconut cracking); Newton's Third Law (equal and opposite action-reaction pairs acting on different bodies) with real-world examples (rowing, recoil of guns, balloon rockets, rocket staging/lunar lander descent); and multi-body connected systems with internal tension vs. external force ($a = \frac{F}{m_1 + m_2}$)