"Power Everywhere" PPT

Description

Hunan Education Edition Fourth Grade Science Volume 2, Ubiquitous Power PPT Courseware

Part One: Knowledge Exploration

ⅠExplore “power” and experience “power”

Force is present in the following examples (push, pull, lift, press, lift). Please think about it, how many objects are there when a force exists (or appears)?

It takes strength for a person to push a cart. It takes strength for a person to lift a bucket.

Bulldozer bulldozing earth Weightlifter lifting barbell

Summary 1: Force is the effect of an object on an object

ⅡHow to judge the effect of force on an object (effect of force)

It is common for objects to be acted upon by forces. Among the many examples of forces just mentioned, how do we say that they are acted upon by forces?

The __________ of volleyball has changed because volleyball is affected by _____.

Summary two:

The effect of force:

① Force can change the shape of an object.

② Force can change the motion state of an object.

Why can't we see the desktop deform when we press it with our hands?

Ⅲ The effects of forces are mutual

When you kick the ball with your toes, the football is affected by the force and changes its motion state. So how do your feet feel at this time?

When one object is affected by another object, is the other object also affected by this object at the same time?

①After releasing the car carrying the bar magnet, how will the car move?

②How do your fingers feel when you press the pencil with your fingers?

③When Xiaohua pushes the wall hard on roller skates, how will she move?

④When Xiao Ming strokes his hand backwards while swimming, what will the water do to Xiao Ming?

Ubiquitous force PPT, part 2: summary and exercises

Summarize:

⒈Force is the effect of an object on an object

2. Force can change the shape of an object; force can change the motion state of an object. (Two effects of force)

3. The effects of forces are mutual.

practise:

⑴ If an iron nail is attracted by a magnet, the iron nail

A. Does not attract magnets

B. It may not attract magnets, it depends on the situation.

C. Also attract magnets

(Principle: The effects of forces between objects are mutual)

(2) Which of the following statements is correct?

A. Force acting on the spring will only cause the spring to deform.

B. When two objects come into contact with each other, they will definitely deform.

C. The football rolls slower and slower on the grass, and its motion status keeps changing.

(Principle: Force can deform an object or change its motion state)

Keywords: Hunan Education Edition fourth grade science PPT courseware for the second volume free download, Ubiquitous Power PPT download, .PPT format;

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"Power Everywhere" PPT download:

Hunan Education Edition Fourth Grade Science Volume 2, Ubiquitous Force PPT Download, Part One Content: Classroom Activities Activity 1: The Role of Force Questions that each group of students should pay attention to during the experiment When you shoot the ball, do you feel that the ball is also hitting you? If so, is it in the same direction as your force? ..

"Power Everywhere" PPT:

Hunan Education Edition, fourth grade science volume 2, omnipresent force PPT, part one content: Suggestions: 1. Press the sponge with your hand and observe the shape of the sponge. When you apply force to the sponge, does the sponge respond? Is it the same direction as your force? 2. Pull a single rubber band and observe the shape...

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Update Time: 2024-09-30

This template belongs to science courseware Hunan Education Edition Fourth Grade Science Volume 2 industry PPT template

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