Chapter 4, Problem 69P

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

Determine the tension in the cable at B, given that the uniform cylinder weighs 350 lb. Neglect friction and the weight of bar AB.

The chain binder is used to secure loads of logs, lumber, pipe, and the like. If the tension T1 is 2.2 kN when θ = 38°, determine the force P required on the lever and the corresponding tension T2 for this position. Assume that the surface under A is perfectly smooth.Assume a = 120 mm, b = 510 mm.

the homogeneous cylinder of weight W=100 N rests in a frictionless right angled corner. determine the contact forces NA and NB angle is 30 degrees

Draw the Free-Body Diagram if the weight acts on point G

A.The bar of negligible weight is supported by two springs, each having a stiffness k = 98 N/m. If the springs are originally unstretched, and the force is vertical as shown, determine the angle the bar makes with the horizontal, when the 31-N force is applied to the bar. B.Determine the stiffness k of each spring so that the 32-N force causes the bar to tip = 13.6° when the force is applied. Originally the bar is horizontal and the springs are unstretched. Neglect the weight of the bar.

The cable is loaded by an 80-lb vertical force at C and a horizonal force P at B. Determine P.

The woman is trying to move the crate of weight W by pulling on the rope at the angle to the horizontal. Find the smallest possible tension that would cause the crate to slide and the corresponding angle .

The three bars are welded together to form a rigid unit that is supported by three slider bearings. Neglecting the weights of the bars, determine the magnitudes of the three bearing reactions caused by the 120-lbin. couple.