A physical pendulum consists of an BScmlong: 24Dgmass, 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 dfdt. The rod is set in oscillation by displacing it 15 D from its equilibrium position and releasing it. After 9.0 5 i the amplitude of the oscillation has been reduced to 5.0 a. (gure 1} Figure 10H 1' I I I I I I I I : 35 cm i l r_-__-' l u :=IS I : V ParlA lithe angular displacement can be written as I9 = AleTt cos aft, find 1r. Express your answer using two signicant figures. ~ ~ 0 '2 R_equestAnswer Part B If the angular displacement can be written as 0 = Aert cos w't, find the approximate period of the motion. Express your answer using two significant figures. IVO AEd ? T = Submit Request Answer Part C If the angular displacement can be written as 0 = Aert cos w't, find how long it takes for the amplitude to be reduced to - of its original value. Express your answer using two significant figures. VO t= S Submit Request