Final answer:
The statement that 'A sandbag is dropped from a balloon' is true in a physical sense, as it is a possible event that can occur under the influence of gravity once the sandbag is released from the balloon.
Step-by-step explanation:
The question seems a little unclear, but it appears to be a true or false statement rather than a conceptual physics question. Yet, based on the associated reference information provided, we can surmise that the core concept relates to the dynamics of forces and motion in physics, particularly considering the action of dropping a sandbag from a balloon. This most closely aligns with the topic of Newtonian mechanics, a foundational concept in physics education.
For a sandbag being dropped from a balloon, one must analyze the forces acting on the sandbag before it is dropped. When held in the balloon, the sandbag is in a state of equilibrium, with the upward force (possibly buoyancy or tension from the balloon) being equal and opposite to the weight of the sandbag. Once the sandbag is released it is subjected to the force of gravity which causes it to fall towards the ground. This physical scenario can be illustrated through a free-body diagram where the only force acting on the sandbag, once released, is its weight due to gravity. The concepts of air density and buoyant force described in Figure 9.1 are crucial for understanding how the balloon rises but they do not directly affect the situation after the sandbag has been dropped. The statement in the query is vague without context, but if it is asserting that a sandbag can be dropped from a balloon it is true, as this is a physically plausible event.