The image above shows two opposite forces acting on a rope. what can we say is true if the forces on each side of the rope is doubled to 150 newtons?

Assuming that the forces acting on the object are equal but in opposite direction. so the forces acting on the object balance out each other, since they are equal but in opposite direction so meaning the net force is zero. and the motion of the object is not affected

Google it that might work

It was ernest rutherford