Hello!!
A mass of 1 kilogram ($1$ kg) that lies at $(0,0,0)$ is hanging from ropes tied at the points $(1,1,1)$ and $(-1,-1,1)$. If the gravitational force has the direction of the vector $\overrightarrow{-k}$ which is the vector that describes the force along each of the ropes?
Could you give me some hints??