An aluminum light pole weighs 4300 N and supports an arm of weight 700 N, with the arm center of gravity at 1.2 m left of the centroidal axis of the pole. A wind force of 1500 N acts to the right at 7.5 m above the base. The pole cross section at the base has an outside diameter of 235 mm and thickness of 20 mm. The maximum compressive stress at the base is approximately:
(A) 16 MPa
(B) 18 MPa
(C) 21 MPa
(D) 24 MPa
(A) 16 MPa
You might also like to view...
An object is moving in a circular path with a radius of 5.00 m. If the object moves through an angle of 270 degrees, then the tangential distance traveled by the object is
A. 4.71 m. B. 15.2 m. C. 23.6 m. D. 40.2 m.
Many Earth-based telescopes are larger than the Hubble Space Telescope, so what justifies the great expense of a "space-based" instrument?
What will be an ideal response?
If the sun's surface cooled, how would its appearance change?
A) It would appear more blue. B) It would stay the same. C) It would become bright white. D) It would appear more red.
How is the energy stored in a current-carrying inductor related to the current value, I?
a. directly proportional to I1/2 c. inversely proportional to I b. directly proportional to I2 d. directly proportional to I