Archimedes’ principle states that an object submerged in a fluid experiences a buoyant force equal to the:
a) Weight of the object
b) Volume of the object
c) Weight of the displaced fluid
d) Density of the fluid
Which force is responsible for making objects feel lighter in water?
a) Gravitational force
b) Buoyant force
c) Centripetal force
d) Frictional force
If an object displaces 5 kg of water, the buoyant force acting on it is:
a) 5 N
b) 50 N
c) 5 kg
d) 9.8 N
A fully submerged object displaces a volume of fluid equal to:
a) Half of its volume
b) Twice its volume
c) Its own volume
d) Its surface area
An object floats in water when:
a) Its weight is greater than the buoyant force
b) Its weight is less than the buoyant force
c) Its weight is equal to the buoyant force
d) The buoyant force is zero
The principle discovered by Archimedes applies to:
a) Only solids
b) Only liquids
c) Only gases
d) Both liquids and gases
Which of the following does NOT affect the buoyant force on an object?
a) Volume of displaced fluid
b) Density of the fluid
c) Gravity
d) Shape of the object
A ship is able to float because:
a) It is made of lightweight materials
b) The water beneath it pushes it up
c) The buoyant force equals its weight
d) The ship repels water
Which of the following will sink in water?
a) An object with density less than water
b) An object with density equal to water
c) An object with density greater than water
d) A hollow object
An object will experience maximum buoyant force when it is:
a) Partially submerged
b) Fully submerged
c) Floating on the surface
d) Out of the fluid
If the density of a fluid increases, the buoyant force:
a) Increases
b) Decreases
c) Remains constant
d) Becomes zero
A submarine changes its depth in water by:
a) Adjusting its shape
b) Changing its density
c) Increasing its speed
d) Rotating its propellers
Which of the following experiences buoyancy?
a) A helium balloon
b) A stone in water
c) A fish in a pond
d) All of the above
The SI unit of buoyant force is:
a) Newton
b) Joule
c) Pascal
d) Kilogram
If an object floats higher in saltwater than in freshwater, it means:
a) Saltwater is denser than freshwater
b) Saltwater is lighter than freshwater
c) Saltwater has less buoyancy
d) The object loses mass in saltwater
Why does a steel ship float but a steel block sinks?
a) The ship has more weight
b) The ship has a hollow design
c) Water repels the ship
d) The block has less density
A person feels lighter while swimming because:
a) Water reduces gravity
b) Buoyant force acts upward
c) Mass decreases in water
d) Water density is high
If a floating object gains weight, it will:
a) Sink completely
b) Rise higher in water
c) Sink lower in water
d) Remain unaffected
The apparent weight of an object submerged in water is:
a) More than its actual weight
b) Less than its actual weight
c) Equal to its actual weight
d) Unchanged
If an object sinks, it means:
a) The buoyant force is greater than its weight
b) The buoyant force is equal to its weight
c) The buoyant force is less than its weight
d) The object has no density
The volume of fluid displaced by a floating object is equal to the object’s:
a) Mass
b) Weight
c) Density
d) Surface area
What happens to the buoyant force if an object is pushed deeper into a fluid?
a) Increases
b) Decreases
c) Remains constant
d) Becomes zero
A floating object displaces:
a) Its own weight in fluid
b) Its own volume in fluid
c) Half of its weight in fluid
d) More fluid than its weight
What is the relationship between pressure and depth in a fluid?
a) Pressure increases with depth
b) Pressure decreases with depth
c) Pressure remains constant
d) Pressure is unrelated to depth
If a body is in equilibrium in a fluid, it means:
a) It is moving
b) The net force on it is zero
c) Its density is less than the fluid
d) There is no buoyant force
A person in a swimming pool finds it easier to lift someone because:
a) The water reduces mass
b) The buoyant force helps lift the person
c) Gravity is weaker in water
d) The person’s density increases
Which object will experience greater buoyant force?
a) A small stone in water
b) A large wooden log in water
c) A coin in air
d) A book on a table
How does a hydrometer measure the density of a liquid?
a) By floating higher or lower
b) By changing color
c) By displacing more fluid
d) By measuring temperature
