Buoyant Force

As an object sinks in a fluid, the buoyant force ____.

• increases

• decreases

• remains the same

• depends on the shape

If an object sinks in a fluid, the buoyant force is ____ the

weight of the object.

• greater than

• less than

• the same as

• does not apply

What is the buoyant force on you if you displace 350 N of

water as you dive under?

• 3.5 N

• 35 N

• 350 N

• 3500 N

Two bricks are the same size. One is made of foam and one is made of stone. They are set in a tank of water. What will happen?

• Both bricks will float

• Both bricks will sink

• The foam brick will sink and the stone brick will float.

• The foam brick will float and the stone brick will sink.

Tags

NGSS.MS-PS3-4

The buoyant force on an object is dependent on _____.

• the object’s density

• the mass of the object

• the volume of the object

• the shape of the object

According to the Archimedes’ principle, the buoyant force on an object is equal to the _____ of the fluid that the object displaces.

• mass

• weight

• density

The buoyant force on an object is in the _____ direction.

• upward

• downward

• sideways

• backwards

How does the buoyant force of helium in a freshly inflated

balloon compare to the weight of the balloon?

• greater than

• less than

• same as

• varies

The buoyant force on a diver _____ as the diver swims deeper.

• increases

• decreases

• remains constant

• varies

Buoyant forces act on an object in a _____.

• solid

• liquid

• gas

• liquid or gas