Lecture 35

Lecture 35 - Today Physics 231 General University Physics...

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1 Physics 231 General University Physics Lecture 35 Lecture 9 1 Today ± Waves Lecture 9 2 Waves - General ± Demo: Interconnected Hanging Weights on Springs ± Demo: Waves on Rubber Rope ± Demo: Slinky on Table ± Demo: Torsion Waves Lecture 9 3 Mechanical Waves ± Some physical medium is being disturbed ± The wave is the propagation of a disturbance through a medium ± In wave motion, energy is transferred over a distance ± Matter is not transferred over a distance ² Discussion: Dominoes Lecture 9 4 Mechanical Wave Requirements ± Some source of disturbance ± A medium that can be disturbed ± Some physical mechanism through which elements of the medium can influence each other ² LD: (CC2C12) Bobbing Boat Lecture 9 5 Pulse on a Rope ± The wave is generated by a flick on one end of the rope ± The rope is under tension ± A single bump is formed and travels along the rope ² The bump is called a pulse ± Demo: Pulse on Rubber Rope
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2 Lecture 9 6 Pulse on a Rope (cont.) ± The rope is the medium through which the pulse travels ± The pulse has a definite height ± The pulse has a definite speed of propagation along the medium ± A continuous flicking of the rope would produce a periodic disturbance which would form a wave Lecture 9 7 Transverse Wave ± A traveling wave or pulse that causes the elements of the disturbed medium to move perpendicular to the direction of propagation is called a transverse wave ± The particle motion is shown by the blue arrow ± The direction of propagation is shown by the red arrow ± Demo: Transverse Wave on Slinky Lecture 9 8
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Lecture 35 - Today Physics 231 General University Physics...

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