Chapter 5, Problem 34P

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 Fe 250 Ib. Determine the torque M which must be exerted by the motor in order to evercome this load. The horse-head Cweighs 59 lb and has a center of gravity at Ge. The walking beam ABC has a weight of 130 Ib and a center of gravity at Gn and the counterweight has a weight of 210 Ib and a center of gravity at Gw. The pitman, AD is pin connected at its ends and has negligible weight (Eguee 1) E Redew Part A Detemine the torque M which must be exerted by the motor Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 Value lb ft 68 16 Submit Previoun Answecs HenuestAnswet X Incorrect: Try Again 250 < Return to Assignment Provide Eeedback

Draw the free-body diagram of the uniform bar, which has a mass of 100 kg and a center of mass at G. The supports A, B, and C are smooth.

6. The crane at equilibrium supports a weight of W=1 kN acting at G. The 8m- long horizontal boom DG has weight of W₁-2.5 kN and center of gravity at G₁ (the center of the boom). The crane (excluding the boom) has a weight of W2-5 kN and center of gravity at G2. The cable KH is horizontal. The two wheels of the crane contact the smooth 30° surface at A and B. (1) To determine the tension force in cable KH and the reactions at A and B, please choose a proper FB and draw the FBD. (2) Determine the tension force in cable KH and the reactions at A and B. 1m 1m G 30° W W₁2m 2m 1m Bi 3m im 30%