The fourbar shown has link lengths masses and moments of ine

The fourbar shown has link lengths, masses and moments of inertia of: Input (a): 2ft, 2lb, 0.125 slug*ft^2 Coupler (b): 3ft, 4lb, 0.3 slug*ft^2 Output (c): 2ft, 3lb, 0.2 slug*ft^2 Ground (d): 3ft All CGs are at the center of the links If the input angular velocity is +10 rad/s, increasing at 20 rad/s^2, and the desired output torque is 100 lb*ft find: The required input torque The reaction forces at all pin joints

Solution

*input torque =50 lb*ft used efficiency output/input

*the reaction forces at all pin joint A=2lb B=2lb O2=4lb O4=5lb