PHY 115
Wave and Oscillation
1. Horizontal oscillations of a spring:
Fig:
Restoring Force,
F=−kxF=−kx
From Newton's second law,
F=ma⟹ma=−kx∴a=−kmx
comparing with equation of SHM, a=−ω2x∴ω2km=gdl | T=2π√mk
2. Vertical oscillation of a spring:
k dl=mgF=k(dl−y)−mg=k(dl−y)−k dl=−ky∴F=−ky T=2π√dlg
♦ Parallel System:
F1≠F2 |F1=−k1yy1=y2=y | F2=−k2y F=F1+F2
♦ Series system:
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