Lecture 4 [02 March, 2020] PHY 115

    PHY 115

Wave and Oscillation






1. Horizontal oscillations of a spring:

Fig:

Restoring Force,  F=kxF=kx  
From Newton's second law,  F=mama=kxa=kmx  

comparing with equation of SHM,  a=ω2xω2km=gdl   | T=2πmk

    2. Vertical oscillation of a spring:

  k dl=mgF=k(dly)mg=k(dly)k dl=kyF=ky T=2πdlg  

    ♦ Parallel System:
  F1F2                 |F1=k1yy1=y2=y           | F2=k2y             F=F1+F2  

    ♦ Series system:

F1=F2=F                |F=k1y1y1y2                         |F=k2y2                y=y1+y2

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