Meriam, Kraige & Bolton — Plane Kinetics of Rigid Bodies: Problem 6_189

6/189 Reconsider the mechanism of Prob. 6/188. If crank $OA$ now starts from rest and acquires a speed of 60 rev/min in one complete revolution with constant angular acceleration, determine and plot the torque $M$ which must be applied to the crank over the range $0 \le \theta \le 2\pi$. What is the largest magnitude $M$ which occurs during this motion, and at what angle $\theta$ does it occur? Additionally, plot the magnitude of the force in each pin over this range and state the maximum magnitude of each pin force along with the corresponding crank angle $\theta$ at which it occurs. Reference from 6/87 & 6/188: - $OA = 80 \text{ mm}$, $AB = 240 \text{ mm}$, $BC = 200 \text{ mm}$. - Horizontal distance O to C $= 190 \text{ mm}$, vertical distance O to C $= 70 \text{ mm}$. - Mass of coupler $AB$, $m_{AB} = 7 \text{ kg}$ (uniform rod). - Masses of crank $OA$ and output arm $BC$ are neglected. - Motion is in the vertical plane.