PS 13.3 Formative

The upward force acting on an object submerged in a fluid is called

• buoyant force

• drag

• pressure

• weight

A brick weighs 26N. Measured underwater, it weighs 11N. What is the size of the buoyant force exerted by the water on the brick?

• 37N

• 26N

• 11N

• 15N

Tags

NGSS.MS-PS2-4

The strength of the buoyant force acting on an object in a fluid depends on the object's

• mass

• surface area

• volume

• weight

The buoyant force on an object in a fluid is equal to the weight of the

• fluid

• fluid surrounding the object

• fluid displaced by the object

• object

The relationship between buoyant force and weight of a displaced fluid was first stated by

• Archimedes

• Bernoulli

• Newton

• Pascal

Why does a hot air balloon float?

• the shape of the balloon provides lift

• the volume of air displaced by the balloon is less than the volume of the balloon

• the weight of the air displaced by the balloon is less than the volume of the balloon

• the weight of the balloon is less than the weight of the air displaced by the balloon

Which of the following substances will float in corn syrup? (The density of corn syrup is 1.38 g/cm³)

• copper

  8.9 g/cm³

• silver

  10.5 g/cm³

• iron

  7.8 g/cm³

• glycerin

  1.26 g/cm³

Tags

NGSS.MS-PS1-2

A submerged submarine alters its (a)   to rise or fall in the water.

The direction of the buoyant force on an object placed in a fluid is (a)   .

The unit g/cm³ is often used to express (a)   .