A physical pendulum consists of an 85-cm-long, 240-g-mass, uniform wooden rod hung from a nail near one end. The motion is damped because of friction in the pivot; the damping force is approximately proportional to de/ dt. The rod is set in oscillation by displacing it 15 from its equilibrium position and releasing it. After 8.1 s, the amplitude of the oscillation has been reduced to 5.5 ° Part A If the angular displacement can be written as 0=Ae-ytcosw't, find y.
A physical pendulum consists of an 85-cm-long, 240-g-mass, uniform wooden rod hung from a nail near one end. The motion is damped because of friction in the pivot; the damping force is approximately proportional to de/ dt. The rod is set in oscillation by displacing it 15 from its equilibrium position and releasing it. After 8.1 s, the amplitude of the oscillation has been reduced to 5.5 ° Part A If the angular displacement can be written as 0=Ae-ytcosw't, find y.
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Help me to solve the sub-part (b) only
Transcribed Image Text:A physical pendulum consists of an 85-cm-long, 240-g-mass, uniform wooden rod hung from a nail
near one end. The motion is damped because of friction in the pivot; the damping force is
approximately proportional to de/dt. The rod is set in oscillation by displacing it 15 . from its
equilibrium position and releasing it. After 8.1 s, the amplitude of the oscillation has been reduced
to 5.5 °
Part A
If the angular displacement can be written as 0=Ae-ytcosw't, find y.
Express your answer using two significant figures.
Part B
If the angular displacement can be written as 0=Ae-ytcosw't, find the approximate period of the
motion.
Express your answer using two significant figures.
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