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People's Education Edition Physics for Grade 8, Volume 2	pptx	6 MB

"Power" PPT courseware 4

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"Power" PPT courseware 4

Rock climbers only rely on their hands and feet to flexibly use grasping, supporting, pedaling and other movements to achieve body balance with "force".

What is force?

1. Force is the effect of an object on an object.

Force is represented by the symbol F, unit Newton, abbreviated as Newton, symbol N.

discuss

1. Can a single object produce a force?

2. There must be no force between objects that are not in contact?

2. Effect of force

1. Force can change the shape of an object and deform it.

2. Force can change the state of motion of an object.

(1) From rest to motion, or from motion to rest;

(2) Changes in movement speed;

(3) Change of movement direction.

Small exercise:

1. When you hit a volleyball with your hand, the force exerting object is _______ and the force receiving object is ___________. The hand also feels pain because of ___________.

2. What are the effects of the following forces?

The goalkeeper catches the football ____________________.

When a spring is under pressure, the spring bends ____________________.

3. Which of the following statements about force is correct ( )

A. There may be powerful effects without objects

B． Force is the effect of objects on objects, so there is no force between objects that are not in contact with each other.

C． When a force occurs, the object exerting the force and the object receiving the force must be found.

D. A force acting on an object can only change the object from rest to motion

Keywords: force teaching courseware, new PEP eighth grade physics PPT courseware for the second volume, eighth grade physics slide courseware download, force PPT courseware download, .ppt format

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Update Time: 2024-10-03

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