Final answer:
Normal tension is the tension that neutralizes the effects of pull and sag in a tape, balancing the forces such that no net motion occurs.
Step-by-step explanation:
The tension at which the effects of pull and sag for a tape are neutralised is known as normal tension. Normal tension occurs when the force exerted by the tension in a cable, rope, or string is balanced such that there is no net force causing motion in the object being supported. In particular, when considering the forces on an object hanging from a tape or string, the tension must cancel out the component of the weight of the object that is parallel to the string, leading to a system where there is no net displacement or stretching due to sagging. In the context of a tape, the initial tension is the amount of tension applied to the tape to counteract the effects of pull and sag, resulting in a neutralized state.