Question

for a balanced force, the net force is always and the speed is for an unbalanced force, the net force is always and the speed is greater than 0 0 constant accelerating

Explanation:

Step1: Recall balanced - force concept

In a balanced - force situation, forces cancel each other out. So the net force is 0. And according to Newton's first law, an object with a net - force of 0 has a constant speed (either at rest or moving with a steady speed).

Step2: Recall unbalanced - force concept

In an unbalanced - force situation, there is a non - zero net force acting on the object. According to Newton's second law ($F = ma$), when there is a non - zero net force, the object is accelerating.

Answer:

For a balanced force, the net force is always 0 and the speed is constant.
For an unbalanced force, the net force is always greater than 0 and the speed is accelerating.