Final answer:
If a trailer is bouncing up and down slowly on a highway, it is more likely that it is heavily loaded.
Step-by-step explanation:
The bouncing of a trailer on a highway can be used to determine whether it is heavily loaded or nearly empty. If the trailer is bouncing up and down slowly, it is more likely that the trailer is heavily loaded. This is due to the oscillations that occur when the suspension system of the trailer is under load.
When a trailer is heavily loaded, the weight of the cargo causes the suspension system to compress and rebound at a slower rate, resulting in slow bouncing. On the other hand, if the trailer is nearly empty or lightly loaded, the suspension system will have less weight to bear, causing faster and more energetic bouncing.