1. PHY238Y Lecture 6 Energy and power of a transverse wave in a string References: Haliday, Resnick, Walker: Fundamentals of Physics, 6 th ed., Wiley 2003, Ch. 17 (17.7) Thanks to dr. R. Nave for the permission to use some of the pictures from Hyper Physics: http://hyperphysics.phy-astr.gsu.eduhttp://hyperphysics.phy-astr.gsu.edu

2. PHY238Y Lecture 6- review from Lecture 5 Transverse Traveling Wave Parameters

3. PHY238Y Lecture 6- review from Lecture 5 Equivalent forms of wave solution: The speed of a traveling wave v is defined by:

4. PHY238Y Lecture 6- review from Lecture 5 Wave speed in a stretched string : a pulse propagating along a string causes additional stretching Segment Δl rolls down to equilibrium following the virtual circle and executing a circular uniform motion with peripheral velocity equal to the wave (pulse) velocity

5. PHY238Y Lecture 6 Energy and power of a traveling string wave  Whoever sets up a wave on a stretched string PROVIDES ENERGY  As the wave moves away, it transports that energy

6. PHY238Y Lecture 6 String energy associated with a wavelength: Power is equal to the rate of energy transfer