Chapter 4, Problem 59P

The pumping unit is used to recover oil. When the walking beam ABC is horizontal, the forceacting in the wireline at the well head is 250 lb. Determine the torque M which must beexerted by the motor in order to overcome this load. The horse-head C weighs 60 lb andhas a center of gravity at Gc. The walking beam ABC has a weight of 130 lb and a centerof gravity at GB, and the counterweight has a weight of 200 lb and a center of gravity atGW. The pitman, AD, is pin connected at its ends and has negligible weight.

Determine the moment or torque being applied at vertical axis of the bolt at A when P-16 ib. 10 in. At 0.75 in.

In order to pull out the nail at B, the force F exerted on the handle of the hammer must produce a clockwise moment of 775 lb. in. about point A. Determine the required magnitude of force F in Kips. Set X= 6, and Y= 24. Note: the figure is not to scale and your answer should contain only numbers, not units. 30°

The shaft-and-pulley assembly ABCD is driven by the torque (couple) suppliedby the electric motor at A. The assembly is also subjected to the two belt tensionsshown at each of the two pulleys. Determine the force-couple system at D that isequivalent to the torque and the four belt tensions.

Using the same figure, determine the components of force F along X-Y axes which are parallel and perpendicular to the incline.

The cable AB prevents bar OA from rotating clockwise about the pivot O. If the cable tension is 820 N, determine the n- and t- components of this force acting on point A of the bar. 2.0 m B Answers: Tn= i Tt= i Attempts: 0 of 4 used Submit Answer -1.5 m Save for Later 63⁰ Z Z N N

The spur gear has a pitch of R= 2.1 in. During a geartrain's operation, an F = 197 lb meshing force acts at 25° relative to horizontal. Determine the moment of that force about the center of the shaft. Use the (a) perpendicular lever arm and (b) moment components methods. Compare the answers of the two methods to verify the accuracy of your work. R (Express your answer using four significant figures.) Mo =| in - lb Select

3-50 with the following modifications: Change the z-coordinate of point A from +6 ft to +8 ft

3-13. The torque wrench ABC is used to measure the moment or torque applied to a bolt when the bolt is located at A and a force is applied to the handle at C. The mechanic reads the torque on the scale at B. If an extension AO of length d is used on the wrench, determine the required scale reading if the desired torque on the bolt at O is to be M. м