Question: 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

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 = 0°, determine

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

(b) The velocity of D,

Fig. P15.59 C B D

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