An object is placed in a fluid and then released. Assume that the object either floats to the surface (settling so that the obje
ct is partly above and partly below the fluid surface) or sinks to the bottom. Answer the following question: The magnitude of the buoyant force is equal to the weight of fluid displaced by the object. Under what circumstances is this statement true?
a. for every object submerged partially or completely in a fluid
b. only for an object that is floating
c. only for an object that is fully submerged and is sinking.
d. for no object submerged in a fluid
A. for every object submerged partially or completely in a fluid
Explanation:
This is following Archimedes principle which states that the upward buoyant force that is exerted on a body immersed in a fluid, whether FULLYor PARTIALLY submerged, is equal to the weight of the fluid that the body displaces.
The resultant force will be equal to difference of her downward force, her weight, and the upward force, the air resistance. Fnet = 657 - 51.1 x 9.81 = 149.7 N F = ma a = F / m a = 149.7/51.1 a = 2.93 m/s²
