The pumping unit is used to recover oil. When the walking beam ABC is horizontal, the force acting in the wireline at the well head is 250 N. Determine 0.5 m 0.6 m - 0.1 m GB A B 70 the torque M which must be exerted by the motor in order to M 20 overcome this E The counterweight has a weight of 200 kg and a center of gravity at GW. o Using both graphical and analytical solution methods load. 250 N 0.25 m 0.3 m