AP physics- finding buoyant force

[astru025]

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!

 

[allykat]

Have you tried using Fb=Fg?

 

[astru025]

What is the equation for Fg?

 

[astru025]

8600 kg x 9.8 m/s^2? Yes tried this, says it is wrong. My answer needs to be in Newtons

 

[Borek]

https://www.physicsforums.com/showthread.php?t=716973