Final answer:
Stability decreases when a load is fully extended overhead, increasing the chance of tipping. Heavily loaded freight trailers tend to bounce more slowly due to a larger damping effect on oscillations. As the moment of inertia increases, angular velocity decreases.
Step-by-step explanation:
When the load is fully extended overhead, stability is decreased. This happens because raising the center of gravity of an object increases the chance of tipping, making the system less stable. As for the other parts of the question: the load itself doesn't get lighter, its weight remains constant. However, depending on how the load is extended and supported, it could become more balanced if it is symmetrically distributed about the point of support.
The moment of inertia of an isolated system has an inverse relationship with its angular velocity. When the moment of inertia increases, the angular velocity decreases, and vice versa, according to the conservation of angular momentum.
As for the trailer example, a trailer that bounces up and down slowly is more likely heavily loaded. A heavy load would have a larger damping effect on the oscillations, causing the trailer to bounce more slowly than if it were nearly empty.