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.