The pumping unit is used to recover oil. When the walking beam ABC is horizontal, the force acting on wireline at the well head is 250 lb. Determine the torque M which must be exerted by the motor in order to overcome this load. The horse head C weighs 60 lb. and have center of gravity at Gc. The walking beam ABC has weight of 130 lb. and center of gravity at Gb , and the counterweight has weight of 200 lb. and center of gravity at Gw. The pitman , AD , is pin connected at the ends and has negligible weight.

The pumping unit is used to recover oil. When the walking beam ABC is horizontal, the force acting on wireline at the well head is 250 lb. Determine the torque M which must be exerted by the motor in order to overcome this load. The horse head C weighs 60 lb. and have center of gravity at Gc. The walking beam ABC has weight of 130 lb. and center of gravity at Gb , and the counterweight has weight of 200 lb. and center of gravity at Gw. The pitman , AD , is pin connected at the ends and has negligible weight.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter4: Coplanar Equilibrium Analysis

Section: Chapter Questions

Problem 4.41P: The center of gravity of the 3000-lb car is at G. The car is parked on an incline with the parking...

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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

The pumping unit is used to recover oil. When the walking beam ABC is
horizontal, the force acting on wireline at the well head is 250 lb. Determine the
torque M which must be exerted by the motor in order to overcome this load.
The horse head C weighs 60 lb. and have center of gravity at Gc. The walking
beam ABC has weight of 130 lb. and center of gravity at Gb , and the
counterweight has weight of 200 lb. and center of gravity at Gw. The pitman , AD
, is pin connected at the ends and has negligible weight.

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