Final answer:
The relationship between higher energetic arousal and performance is described by the Yerkes-Dodson law. In terms of weight and fuel efficiency, there is a positive correlation: as weight increases, fuel efficiency decreases.
Step-by-step explanation:
The relationship between higher energetic arousal and performance is described by the Yerkes-Dodson law. This law states that moderate arousal is generally best for performance, while very high or very low arousal can hinder performance. In terms of weight and fuel efficiency, a positive correlation exists. This means that as weight increases, fuel efficiency decreases. So, lighter objects or vehicles are typically more fuel-efficient compared to heavier ones.