# Homework Help: Are units tension vectors?

1. Feb 8, 2007

### suspenc3

1. The problem statement, all variables and given/known data

See Attachment

2. Relevant equations

3. The attempt at a solution

Im just trying to figure out all of the forces, im kinda confused about the whole $$T_{BDC}$$ Do i just make these two separate tensions...and then add them together or something? Can someone explain how I should go about doing this? Also concerning the tensions, should I just make them into unit vectors...in i, j, and k components?

Im kinda new to these problems, any help would be appreciated..

Thanks

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2. Feb 9, 2007

### AlephZero

The cable BDC is continuous and there is a pulley at D. So the tension in the two parts BD and DC is the same.

Yes, you will need to resolve the tensions in the strings into their i j k components. That's how you represent the fact that the force must act along the length of the string, not in a different direction.