# Differences

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 phy131studiof16:lectures:chapter15 [2016/11/09 09:13]mdawber [Waves on a string] phy131studiof16:lectures:chapter15 [2016/11/09 09:14] (current)mdawber [Pulses] Both sides previous revision Previous revision 2016/11/09 09:14 mdawber [Pulses] 2016/11/09 09:13 mdawber [Waves on a string] 2016/11/08 13:47 mdawber [A flaming tube] 2016/11/08 13:31 mdawber [Chapter 15 - Waves] 2016/07/29 12:42 mdawber 2016/07/21 12:07 external edit 2016/11/09 09:14 mdawber [Pulses] 2016/11/09 09:13 mdawber [Waves on a string] 2016/11/08 13:47 mdawber [A flaming tube] 2016/11/08 13:31 mdawber [Chapter 15 - Waves] 2016/07/29 12:42 mdawber 2016/07/21 12:07 external edit Line 8: Line 8: Suppose we consider a 1 dimensional medium to be a number of masses connected to each other by springs. Suppose we consider a 1 dimensional medium to be a number of masses connected to each other by springs. - The [[wp>​Shive_wave_machine|Shive Wave Machine]] is essentially such a system, the rods in the machine are connected to each other by a wire (you can think of each element as torsional pendulum. When one spine is displaced the next one feels a force pushing in the same direction, if a continuous force is applied to the system the whole system can move to a new equilibrium. + The [[wp>​Shive_wave_machine|Shive Wave Machine]], seen in [[http://​www.animations.physics.unsw.edu.au/​jw/​oscillations.htm#​physics|this animation]], ​is essentially such a system, the rods in the machine are connected to each other by a wire (you can think of each element as torsional pendulum. When one spine is displaced the next one feels a force pushing in the same direction, if a continuous force is applied to the system the whole system can move to a new equilibrium. However if a short disturbance is applied a pulse is observed. When the force at the source is removed the rods are driven back to the their equilibrium position by the restoring force, just like in simple harmonic motion. The duration of the pulse on the machine depends on the time the driving force is applied. However if a short disturbance is applied a pulse is observed. When the force at the source is removed the rods are driven back to the their equilibrium position by the restoring force, just like in simple harmonic motion. The duration of the pulse on the machine depends on the time the driving force is applied.