UNIVERSITY PHYSICS I CHAPTER 7 Simple Harmonic Oscimation §7.1hook' s force law 1. Ideal model-spring oscillator k 0000000m x A x=0 +A elasticity inertia Equilibrium position 2. Hook's force law Horizontal direction: =-k i 11 §7.1 Hook’s force law 1. Ideal model—spring oscillator Equilibrium position − A + A x Horizontal direction: 2. Hook’s force law F kxi ˆ s = − r elasticity inertia