Rocker arms AB and CD in Figure RP11–4 rock the horizontal deck of a combine back and forth. Assume that each arm accelerates uniformly to the midpoint of its arc and then decelerates uniformly to the...

Rocker arms AB and CD in Figure RP11–4 rock the horizontal deck of a combine back and forth. Assume that each arm accelerates uniformly to the midpoint of its arc and then decelerates uniformly to the end of the arc. A complete cycle takes 2 seconds. Determine (a) the maximum angular velocity and (b) the angular acceleration.

Figure RP11–4