Arm ABC is connected by pins to a collar at B and to crank C

Arm ABC is connected by pins to a collar at B and to crank CD at C. Neglecting the effect of friction, determine the couple M required to hold the system in equilibrium when = 90°.

Take the applied load P to be 330 N. (Round the final answer to its nearest whole number.)

The couple M required to hold the system in equilibrium when = 90° is  kN·m. (Counterclockwise)

Solution

Moment about D

M= 330*(300-250)/1000Nm=1.65kN.m