Compared with the buoyant force of the atmosphere on a 1-kg helium-filled balloon,the buoyant force of the atmosphere on a nearby 1-kg solid wood block is
A)considerably less.
B)considerably more.
C)the same.

Question

Quizplus · Accepted Answer

The buoyant force on an object is equal to the weight of the fluid displaced by the object. In the case of the helium-filled balloon, the balloon displaces air (which is a fluid) and since helium is lighter than air, it experiences a significant upward buoyant force. However, the solid wood block has the same weight as the balloon but does not displace as much air as the balloon would, resulting in a lesser buoyant force acting on it. Hence, the buoyant force on the block is considerably less than that on the helium-filled balloon.

Compared with the Buoyant Force of the Atmosphere on a 1-Kg