Answered: -5 ft- 1 ft Y9- -6 ft – Gc C GB A B 70°…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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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 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
has a center of gravity at Gc. The walking beam ABC has a weight of 130 lb and a center
of gravity at GB, and the counterweight has a weight of 200 lb and a center of gravity at
GW. The pitman, AD, is pin connected at its ends and has negligible weight.

-5 ft -
-6 ft-
-1 ft
!GB
B
70°
M
20°
250 Ib
3 ft 2.5 ft

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