# Forces experiment. Needing to find vector sum of the tensions in string.

## Homework Statement

The question is: find the vector sum of the tensions in the strings; remember to multiply each mass by g. In theory, this sum should be the zero vector.

We had to use pulleys and weights and find the angle and mass of a third hanger to make a ring in the middle of a plate in equilibrium.

For one example: We placed .200kg on a hanger at 30 degrees and 120 degrees. For equilibrium we needed a hanger at 255 degrees with .275kg It says we need to find the vector sum of the tensions.

Our teacher didn't tell us how to go about doing so. We thought we would use fnetx and fnety Something like: .200(9.8)cos(30) + .200(9.8)cos(120) + .275(9.8)cos(255) = Fnetx

Then do it for Fnety with sin.

Is this correct? A lab partner thought this was right. I'm completely lost in my physics 151 class. I know vector sum is when you add the vectors, but are these considered vectors?

Any help I would be grateful for!!!

Thanks,
Matt