A 2.0 Kg bucket is hanging motionless from a rope , assume the rope has no mass , What is the net force acting on the bucket ?

There are two forces acting along the same line. They are: 1 gravitational force. 2. Tension in the rope. Gravity is vertically down wards and tension vertically upward. When the bucket is at rest, these two forces are balanced. Therefore, The net force of bucket - rope system is zero. When you consider the bucket alone, then the force on it is MassXg=> 2.0X9.8N =>19.6N