As below.

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- Oct 16th 2011, 07:07 AMBabyMiloFinding force using vector
As below.

- Oct 17th 2011, 05:59 AMearbothRe: Finding force using vector
1. There isn't enough information to determine the force which is exerted by cable s or t. You only can state that both cables together apply a force on the boom.

2. Draw a sketch such that the cables s and t are located in one plane.

3. Draw the parallelogram of forces.

4. Use siilar triangles to determin $\displaystyle \vec F_{string}$ and $\displaystyle \vec F_{boom}$