Question

- A pine log floats on fresh water. The specific of pine wood is 0.43. What percentage of wood is beneath the surface? gravity! the

Answer 1

According to the buoyancy principle of Archimedes, when a body is immersed in a static fluid (liquid/gas), it disperses an amount of fluid equal to the immersed volume of the body.

So, the weight of the floating body = Weight of the volume of the fluid dispersed (volume of the body beneath the fluid).= buoyant force.

Here, Let, the volume of the pine log is V and that beneath the water is x.

So, V*0.43*water density*g= x*water density*g...............(g= gravitational acceleration)

So, x/V = 0.43. = 43%

Ans: The portion of the pine log beneath the water is 43%.