A 4-lb uniform rod is supported by a pin at O and a spring at Aand is connected to a dashp...

A 4-lb uniform rod is supported by a pin at O and a spring at Aand is connected to a dashpot at B.Determine (a) the differential equation of motion for small oscillations, (b) the angle that the rod will form with the horizontal 5 s after end Bhas been pushed 0.9 in. down and released.