Unit 5 (Forces in Fluids) Review

Why does this object weigh less in water?

• Because its pressure increase

• Because its buoyant force counteracts gravity

• Because it has more mass in water

Which object has a greater buoyant force than force of gravity?

• A

• B

• C

Which two factors does an object's buoyancy depend on?

• Shape and pressure

• Shape and density

• Pressure and density

The following image does not show a closed system. Where is pressure the greatest?

• At the top of the bucket

• In the middle of the bucket

• At the bottom of the bucket

What is the buoyant force of Cube 1?

• 1.96 N

• .20 kg

• 350 g

• 3.43 N

Where is the pressure greatest?

• Below the airplane wing

• Above the airplane wing

Which object is the most dense?

• A

• B

• C

What is the equation for density?

• D = MxV

• D = M/V

• D = V/M

• D x V = M

What is the buoyant force of this object?

• 2 N

• 9.8 N

• 19.6 N

• 5 N

What is the equation for mass (M)?

• M = D x V

• M = D/V

• M/V = D

• M = D + V