(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The tower is 70 m tall. If the tension in cable BC is

2 kN, and you want to adjust the tensions in cable

BD and BE so that the couple exerted on the tower

by the fixed support at A is zero.

A) Determine the tensions in cable BD and BE

by applying the sum of the moments about

point A .

The Coordinates in meters

B(0,70,0)

A(0,0,0)

C(-50,0,0)

D(20,0,50)

E(40,0,-40)

2. Relevant equations

M=Fd

3. The attempt at a solution

Well I know that I have to solve by taking the sum of the moments about A. That means that the Moment about A of Tension BC + Moment about A of Tension BD + Moment about A of Tension BE = 0

and The moment about A of Tension BC is nothing more than the Fx of Tension BC about the distance from point A to B. So That means I find the angle that Tension BC makes to the tower get my Fx and times it by the tower distance. So now what do I need to do next. Looking for the next step.

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# Homework Help: Finding the Tensions using the sum of moments

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