The test rig shown was developed to perform fatigue testing on fitness trampolines. A motor drives the 9-in radius flywheel AB, which is pinned at its center point A, in a counterclockwise direction. The flywheel is attached to slider CD by the 18-in connecting rod BC. Knowing that the "feet" at D should hit the trampoline twice every second, at the instant when θ= 30°, determine 

(a) The angular velocity of the connecting rod BC, 

(b) The velocity of D, 

(c) The velocity of midpoint CB.

Transcribed Image Text:

D