The vertical plane containing the utility cable turns 30 degrees at the vertical pole OC. The tensions T_1 and T_2 are both 950 Newtons. In order to prevent long-term leaning of the pole, guy wires AD and BE are utilized. If the two guy wires are adjusted so as to carry equal tensions T which together reduce the moment at O to zero, determine the net horizontal reaction at O. Determine the required value of T. Neglect the weight of the pole.
The light blue lines indicate the axises (x, y, z axis). The darker light blue ones are imaginary; they're only shown for angling purposes. The red arrows are the two forces, T_1 and T_2. T_1 lies on the yz-plane. T_2 lies on that imaginary darker light blue plane
Lines:
OA = 9m
OD = 8m
OB = 11m
OE = 10m
OC = 13m
Is this physics? Yes it is, but to be more specific, this is an engineering mechanics class called statics, meaning everything is equal to zero. 99% of this subject involves free body diagrams, so the pictures are important. The summation of all forces moment (which is torque) in all 3 dimensions are equal to zero. It's applied physics and requires knowledge of only two things: force and moment (which is torque). Hardest part is finding the values so that the summation of all forces and moment equal to zero. So if you are good with those two things, then you should be able to do this.
The answers to this problem are:
O = 144.9 N, T = 471 N
But i want to see your work, I wanna see how you guys got the answer.
Post has been edited 2 time(s), last time on Oct 28 2007, 9:31 am by MillenniumArmy.
None.
