*What is the formula to find the buoyant force?*
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Answers
Answer:
When an object is immersed in a fluid, the upward force on the bottom of an object is greater than the downward force on the top of the object. The result is a net upward force (a buoyant force) on any object in any fluid. If the buoyant force is greater than the object’s weight, the object will rise to the surface and float. If the buoyant force is less than the object’s weight, the object will sink. If the buoyant force equals the object’s weight, the object will remain suspended at that depth. The buoyant force is always present in a fluid, whether an object floats, sinks or remains suspended.
The buoyant force is a result of pressure exerted by the fluid. The fluid pushes on all sides of an immersed object, but as pressure increases with depth, the push is stronger on the bottom surface of the object than in the top (as seen in ).
You can calculate the buoyant force on an object by adding up the forces exerted on all of an object’s sides. For example, consider the object shown in.
The top surface has area
A
and is at depth
h
1
; the pressure at that depth is:
Answer:
To calculate the buoyant force, simply plug in the numbers. Now our equation reads: FB = 1.0 kg/L * 1.0 L * 9.8 m/s2. Once we do the math, we find that the buoyant force equals 9.8 kg-m/s2, which is the same as 9.8 Newtons. If the weight of the object is more than 9.8 N, then the object will sink.