1. Topic: Floating and Sinking

2. Density – Is its mass per unit volume.
1. Formula = Density = mass/volume
= g/mL or g/cm3
*How tightly packed the atoms are
2. By comparing densities you can predict whether an object will float or sink in a fluid. An object that is more dense will sink, an object less dense will float.
Ex.

3. B. Buoyant Force – The pressure on the bottom of a submerged object is greater than the pressure at the top. The result is a net force in the upward direction The buoyant force acts in the direction opposite to the force of gravity, so it makes objects in fluids feel lighter. Ex.

5. C. Archimedes Principle – The buoyant force acting on a submerged object is equal to the weight of the volume of the fluid displaced. Ex.

6. What is density?
How can you use the density of an object to predict whether it will float or sink in water?
Some canoes have compartments on either end that are hollow and watertight. These canoes won’t sink even when upside down. Explain Why.
How does the buoyant force affect a submerged object?
How does Archimedes’ principle relate the buoyant force acting on an object to the fluid displaced by the object?
An object the weighs 340N floats on a lake. What is the weight of the displaced water. What is the buoyant force?