"Understanding Buoyancy" Buoyancy PPT Courseware 2

Description

"Understanding Buoyancy" Buoyancy PPT Courseware 2

learning target

1. Know what buoyancy is;

2. Through experimental exploration, realize that objects immersed in liquid or gas are affected by buoyancy;

3. Know the causes of buoyancy.

Buoyancy: An object immersed in a liquid or gas is pushed upward by the liquid or gas.

Direction of buoyancy: vertically upward

Causes of buoyancy

The difference in pressure between the upper and lower surfaces of an object is the buoyancy force exerted by the liquid on the immersed object.

F float = F up - F down

The magnitude of buoyancy has nothing to do with depth

Note: When there is no liquid on the lower surface of the object (or it is tightly connected to the bottom), ____ buoyancy.

For example: a bridge pier standing on the river bed; a foot stuck in the mud of the river.

Class exercises

1. A stone weighs 5 N. Hang the stone on the lower end of the spring dynamometer and immerse it in a certain liquid. At this time, the spring dynamometer indicates 2 N, then the stone is subject to the buoyancy force of the liquid. for __N. The direction of the buoyancy force______, the object exerting the force

It is _______ the effect of ______ buoyancy when the stone sinks in the liquid (optional "suffer" or "not").

Class summary

1. Understand buoyancy:

1. Definition of buoyancy: An object immersed in a liquid (or gas) is pushed upward by the liquid (or gas), which is called buoyancy.

2. Direction of buoyancy: always vertically upward.

3. Buoyant force exerting object: liquid or gas.

4. Measure buoyancy by weighing method.

2. Causes of buoyancy:

The difference between the upward and downward pressure of a liquid (or gas) on an object.

Formula: F float = F up - F down

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For more information about the "Buoyancy Understanding Buoyancy" PPT courseware, please click the Buoyancy ppt Understanding Buoyancy ppt tag.

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File Info

Update Time: 2024-11-17

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

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