P10_pendulum3

P10_pendulum3 - Pendular Motion Name: Teammates: Pendulum...

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n Pendular Motio Name: Teammates: Pendulum Fig. 1: Pendulum Pendulums have been used for millennia as a tool for mankind. One use for which they have proven extremely useful is for keeping time. The reason for this is because their frequency is dependent upon only one variable. To see this, let us consider a pendulum in which we neglect the actions of friction or drag. The only two forces on the pendulum mass are the tension in the support and gravity. If the pendulum is pulled back from equilibrium to an angle θ , then setting the forces along the support (that is along the radial direction L) equal to zero gives us that the tension in the support is equal to mg cos θ . In the direction perpendicular to the support, there is only one force, which is mg sin θ . This is the lone force that will drive the motion of the pendulum mass, which means that F net = ma = -mg sin θ This force is not constant; it gets larger for larger values of θ (sin θ gets larger as θ increases from 0), and it always points back to the equilibrium position.
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This note was uploaded on 02/09/2011 for the course PHYS 2211L taught by Professor Jeremyr.gulley during the Spring '11 term at Kennesaw.

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P10_pendulum3 - Pendular Motion Name: Teammates: Pendulum...

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