What is the definition of net upward force?

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The discussion revolves around the concept of net upward force, particularly in the context of buoyancy and forces acting on an object submerged in a fluid. Participants are exploring the definitions and implications of this force in relation to external forces required to maintain an object's position in the fluid.

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  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to clarify the definition of net upward force and its relationship to buoyant force and weight. Questions about the implications of net force and the conditions under which an object remains stationary in a fluid are also raised.

Discussion Status

Some participants have provided definitions and explanations regarding the terms involved, such as buoyant force and weight. There is an ongoing exploration of how these forces interact, but no consensus has been reached on the broader implications or applications of the concept.

Contextual Notes

There appears to be a need for further elaboration on the original question regarding net upward force, as some participants suggest expanding on the inquiry to facilitate deeper understanding.

Palak Verma
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To keep the can immersed, an external downward force is needed to balance the net upward force(=F'b-W).
 
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You may want to expand on your question.
 
F'b means maximum upthrust.
 
The expression "net force in direction x" means the sum of all forces, or components of forces, that act in direction x. If the sum of forces acting in the x direction is zero then the object isn't accelerating in the x direction.
 
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Palak Verma said:
To keep the can immersed, an external downward force is needed to balance the net upward force(=F'b-W).
F'b is the buoyant force (due to hydrodynamic pressure) on the can, and W is the weight of the can and its contents. The "net upward force" as used in the present context is the buoyant force minus the weight.

Chet
 
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