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-5 ft- – 1ft -6 ft GB B 70° M G. 20 250 Ib 3 ft 2.5 ft

-5 ft- – 1ft -6 ft GB B 70° M G. 20 250 Ib 3 ft 2.5 ft

International Edition---engineering Mechanics: Statics, 4th Edition
International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter7: Dry Friction
Section: Chapter Questions
Problem 7.20P: The 3600-lb car with rear wheel drive is attempting to push the 4500-lb crate. The center of gravity...
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Determine the torque M which must be exerted by the motor. Express the answer with 3 significant figures and include appropiate units. 

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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 Fc = 250 lb. Determine the torque M which must be exerted by the motor in order to overcome this load. The horse-head C weighs 64 lb and has a center of gravity at Gc. The walking beam ABC has a weight of 130 Ib and a center of gravity at GB. and the counterweight has a weight of 195 lb and a center of gravity at Gw. The pitman, AD, is pin connected at its ends and has negligible weight. (Figure 1)
Transcribed Image Text: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 Fc = 250 lb. Determine the torque M which must be exerted by the motor in order to overcome this load. The horse-head C weighs 64 lb and has a center of gravity at Gc. The walking beam ABC has a weight of 130 Ib and a center of gravity at GB. and the counterweight has a weight of 195 lb and a center of gravity at Gw. The pitman, AD, is pin connected at its ends and has negligible weight. (Figure 1)
-5 ft -6 ft --1 ft GB C B 70° M G20° 250 lb 3 ft 2.5 ft
Transcribed Image Text:-5 ft -6 ft --1 ft GB C B 70° M G20° 250 lb 3 ft 2.5 ft
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