AP physics- finding buoyant force

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Homework Help Overview

The discussion revolves around a physics problem related to buoyant force, specifically involving a cubic meter of material with a known mass submerged in water. Participants are exploring how to calculate the buoyant force acting on the submerged block.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to apply the buoyant force equation but is uncertain about how to determine the volume displaced by the cube. Other participants suggest considering the relationship between buoyant force and gravitational force.

Discussion Status

The discussion is ongoing, with participants exploring different approaches to the problem. Some guidance has been offered regarding the relationship between buoyant force and gravitational force, but there is no explicit consensus on the next steps or resolution of the problem.

Contextual Notes

The original poster notes a requirement for the answer to be in Newtons, which may influence the approach to the problem. There is also a reference to a previous thread that may contain relevant information.

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Homework Statement



A cubic meter of some material has a mass of 8600 kg. The block of material is lowered into a lake by a strong cable until the block is completely submerged. Find buoyant force on the block.

Homework Equations



Fb= p x V x g.
p= density of fluid, density of water is 1 g/cm^3.
V= displaced volume
g=9.8 m/s


The Attempt at a Solution


So far I have Fb= 1g/cm^3 x V x 9.8 m/s. I need to find V or the volume displaced by the cube in water. How do I do this? Any help would be appreciated! Thanks!
 
Physics news on Phys.org
Have you tried using Fb=Fg?
 
What is the equation for Fg?
 
8600 kg x 9.8 m/s^2? Yes tried this, says it is wrong. My answer needs to be in Newtons
 

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