"The Floating and Sinking of Objects" Buoyancy PPT Courseware 2

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"The Floating and Sinking of Objects" Buoyancy PPT Courseware 2

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1. Definition of buoyancy:

2. Direction of buoyancy:

3. Factors affecting buoyancy: ρ liquid, V discharge

4. The size of buoyancy

formula

F float = G — F pull

F float = G row = ρ liquid V row g

think?

When objects are immersed in water, some objects will sink, some objects will float, and some objects can stay at any depth. Why?

The change of the object's motion state is related to the force

Force analysis

1. Floating and sinking conditions of objects

objects immersed in liquid

1. The floating and sinking of an object depends on the gravity and buoyancy.

2. Floating and sinking conditions of objects (immersed)

F floating

F float = G substance suspended

F float>G object float up

2. Application of floating and sinking conditions

F float = G — F pull

F float = G row = ρ liquid V row g

F float = G object (floating, suspended)

1. Density meter

Function: Measure liquid density

Principle: Floating F float = G object

Reading: The reading becomes larger from top to bottom.

2.Application: Salt water seed selection

ship

practise:

1. The density of sea water is greater than that of river water, so when the ship sails from the river to the sea, the hull will be _____, and the buoyancy force on the ship will be _______.

2. A ship has a displacement of 2500t and a dead weight of 106 N. At this time, the weight of the cargo on the ship is ______N; when its load increases, the buoyancy force on the ship is ______. The value of the change in buoyancy _____ the number of changes in load (fill in "greater than" or "equal to" or called "yu")

1. If an object with a mass of 50 grams and a volume of 60 cm3 is put into water, what is the buoyant force on the object when it is at rest? What about throwing yourself into alcohol?

2. A solid iron ball with a mass of 100 grams is dropped into mercury. What is the buoyant force on the iron ball when it is at rest?

3. When a wooden block with a volume of 200cm3 floats on the water, exactly half of the volume is submerged in the water, then the gravity of the wooden block is ___ and the density of the wooden block is _____.

4. There is a piece of ice floating on the water. The volume above the water is 100 cm3. Find the volume of the ice cube and the gravity of the ice cube?

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For more information about the "Floating and Sinking of Buoyant Objects" PPT courseware, please click on the "Floating and Sinking of Buoyant Objects" ppt tag.

"The Floating and Sinking of Objects" Buoyancy PPT Courseware 4:

"The Floating and Sinking of Objects" Buoyancy PPT Courseware 4 New knowledge to sort out the floating and sinking conditions of an object. When the buoyancy force _________gravity, the object floats; when the buoyancy force________gravity, the object sinks; when the buoyancy force________gravity, the object In a suspended or floating state. ..

"The Floating and Sinking of Objects" Buoyancy PPT Courseware 3:

"The Floating and Sinking of Objects" Buoyancy PPT Courseware 3 Scenario Introduction Why do steel giants like the Titanic float on the sea? Why did the Titanic sink after hitting an iceberg? What exactly determines whether an object floats or sinks? Collaborative Inquiry Inquiry Point Object..

"The Floating and Sinking of Objects" Buoyancy PPT Courseware:

"The Floating and Sinking of Objects" Buoyancy PPT Courseware Learning Objectives 1. Know the floating and sinking conditions of objects; 2. Understand the application of physical knowledge in production, life and society through the practical application of floating and sinking conditions; 3. Know the density meter and salt water selection The origin of species, submarines, and hot air balloons..

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Update Time: 2024-09-28

This template belongs to Physics courseware Shanghai Science Edition 8th Grade Physics industry PPT template

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