Buoyant Force and Archimedes' Principle

The video explains why heavy ships float while small metal objects sink, using Archimedes' principle. It describes buoyant force, which is the upward force exerted by fluids, and how it equals the weight of the displaced fluid. The video also covers applications of buoyancy in ships and swimming, and explains why some objects float while others sink. It concludes with a discussion on how pressure affects buoyant force.

What did Archimedes discover that led him to shout 'Eureka'?

• The principle of flotation

• The principle of thermodynamics

• The principle of relativity

• The principle of gravity

What happens to an object's weight when it is submerged in a fluid?

• It becomes heavier

• It disappears

• It remains the same

• It feels lighter

What is the main reason a helium balloon rises in the air?

• It is lighter than air

• It is pushed up by air pressure

• It is filled with a special gas

• It has a unique shape

What is the buoyant force dependent on according to Archimedes' principle?

• The color of the object

• The shape of the object

• The weight of the displaced fluid

• The temperature of the fluid

Why do ships float according to Archimedes' principle?

• They have a special coating

• They are made of lightweight materials

• They are powered by engines

• They displace a large volume of water

What happens to the buoyant force when more fluid is displaced?

• It decreases

• It remains the same

• It becomes zero

• It increases

Why do some people sink while others float in water?

• Because of the water temperature

• Due to the color of their swimsuit

• Because of their body density and volume

• Due to their swimming skills

How does the pressure in a fluid change with depth?

• It fluctuates randomly

• It decreases

• It increases

• It remains constant

What is the role of fluid pressure in creating buoyant force?

• It only affects gases

• It pushes objects downward

• It creates a net upward force

• It has no effect

What happens to the buoyant force if the submerged object is replaced with a different material?

• It changes based on the material

• It remains the same

• It becomes zero

• It doubles