L 10-7: Buoyancy and Archimedes principle

Question 1

Where do you feel object is heavier? Inside water or

outside?

Answer 1

Objects submerged in a fluid appear to weigh less

than they do when outside the fluid.

Question 2

Archimedes’ Principle

Answer 2

When a body is immersed fully or partially in a fluid it
experiences an upward force = to the weight of fluid
displaced by that object

Question 3

Definition of Buoyant Force.

Answer 3

it is an upward force applied by a fluid.

(liquid or gas) on a object in the fluid

Question 4

Float:

Answer 4

• When the density of the fluid is bigger than density of object
• FB bigger than Fg

Question 5

sink

Answer 5

• When the density of object is bigger than density of fluid.
• Fg is bigger than FB