Archimedes' Principle Part 1

What does Archimedes' Principle state?

• An object will always sink in water if its mass is greater than 1 kg.

• A body immersed in a fluid experiences an upward buoyant force equal to the weight of the displaced fluid.

• Objects float only if they are hollow inside.

• The force of gravity does not act on objects in a fluid.

What is the primary reason a ship made of steel can float in water?

• The ship is moving fast enough to stay above water.

• The ship is filled with air, reducing its overall density

• The ship is not affected by gravity while in water.

• The weight of the ship is greater than the buoyant force.

If an object is fully submerged in a fluid, what determines the buoyant force acting on it?

• The object's volume

• The object's weight

• The density of the fluid and the volume of the displaced fluid

• The depth of the object in the fluid

An object will float on water if:

• Its weight is greater than the buoyant force.

• It displaces more water than it weighs.

• Its density is less than the density of water.

• It is heavier than an equal volume of water.

What happens to the buoyant force when an object is placed in a denser fluid?

• It decreases because denser fluids provide less support.

• It stays the same because buoyant force depends only on the object.

• It increases because a denser fluid exerts a greater buoyant force.

• It disappears because the object is more likely to sink.

What is the SI unit of buoyant force?

• Newton (N)

• Pascal (Pa)

• Kilogram (kg)

• Joule (J)

A solid object weighs 50 N in air and 30 N when fully submerged in water. What is the buoyant force acting on it?

• 20 N

• 30 N

• 50 N

• 80 N

Which of the following statements is true about objects in a fluid?

• Objects denser than the fluid always float.

• Objects less dense than the fluid always sink.

• Objects experience an upward force equal to the weight of the displaced fluid.

• The buoyant force depends only on the object's mass.

If a block of wood floats on water, what can be said about the weight of the block compared to the buoyant force?

• The weight is greater than the buoyant force.

• The weight is equal to the buoyant force.

• The weight is less than the buoyant force.

• The buoyant force does not act on the block.

How does the volume of displaced fluid compare to the volume of a submerged object?

• It is always greater than the object's volume.

• It is always equal to the object's volume.

• It is always less than the object's volume.

• It depends on the object's density.