Solving Archimedes Principle: 6500kg Iceberg in Sea

[pat666]

Homework Statement

a 6500kg iceberg is afloat in the sea. the icebergs density is 930kg/m^3 and the sea water has density of 1030kg/m^3
a) find the buoyant force on the iceberg
the volume of water displaced and the fraction of the icebergs volume that is below the waterline.

Homework Equations

F_B=x_displaced=rho g V

The Attempt at a Solution

i have no idea how to do this i thought that maybe since its not sinking its in equilibrium relative to something but i have no idea if that's even right or not.. thanks for any help in advance.

 

[Borek]

You are on the right track. It is pulled down by gravity, and pushed up by buoyancy - these are two forces in equilibrium. One of these is very easy to calculate from the data given - that gives you the other one (they are in equilibrium, which means they are identical).

 

[pat666]

ok thank you i can't believe i missed that - problem solved thanks to you and PF!