Answer
The forces are pulling at right angles to each other.
Work Step by Step
If the given forces satisfy the equation $a^2+^2=c^2$, then the forces are pulling at right angles.
$50^2+120^2\overset?=130^2 \longrightarrow$ find the squares
$2500+14400\overset?=16900 \longrightarrow$ add
$16900=16900\checkmark$
