The system represented in the figure consists of a 2 kg pulley to which two springs and a rigid square with 10 kg/m are connected, which in turn is articulated at point B (System is in the xz plane).
Dynamic equilibrium equations:
Can someone explain these 2 terms in yellow? It's making me a bit of confusion since I thought it should be "+" and not "-" and both terms should be equal to each other and not symmetrical
this was the free body diagramm that i draw
In other exercice that i done, they consider JTeta1 and JTeta2 in the opposite direction