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

Description

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

Scenario introduction

Why do giant steel ships 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

Research point: The sinking and floating conditions of objects

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

The floating and sinking conditions of objects:

(1) F float > G, float up

The inevitable result of floating is - floating

(F float = G)

(2) F float < G sink

The result of sinking - sinking to the bottom

(F float + N = G)

(3) F float = G float

Floating and sinking conditions V row = V object

Float up F float > G ρ liquid > ρ matter

Suspension F float = G ρ liquid = ρ matter

sink F float < G ρ liquid < ρ object

discuss:

A solid object is immersed in a liquid. Can you judge whether the object will float or sink based on the relationship between the density of the object and the density of the liquid?

Conclusion: ρ substance = ρ liquid suspension

ρ object > ρ liquid sinks

ρ substance＜ρ liquid floats

In-class training

1. Three small balls of the same volume are immersed in water. When they come to rest, which one of them experiences a greater buoyant force?

The buoyant force on the plastic ball and the iron ball is equal and maximum.

The wooden ball experiences the least buoyant force.

2. Two iron balls of the same volume are placed in water and mercury respectively. Which one experiences greater buoyancy?

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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.

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Update Time: 2024-09-27

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

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