87.3 A vertically oriented spring From the initial condition x 小==<0 >兀 vn=- Dosing>0→sinφ<0 B=arct(--0)+r=arct 十兀 g 87.4 simple harmonic motion and the uniform circular motion I. Gelileo's observation of the moons of Jupiter 5 an.15202530Feb.510152025Mar.1 What can you imagine from the results? 88 π π ω φ = − + = + mg kh x v arctg( ) arctg 0 0 sin 0 cos 0 0 0 = − > = < ω φ φ v A A x sinφ < 0 φ > π From the initial condition §7.3 A vertically oriented spring §7.4 simple harmonic motion and the uniform circular motion 1. Gelileo’s observation of the moons of Jupiter What can you imagine from the results?