"Power" Power PPT courseware download

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"Power" Power PPT courseware download

The first part of the content: Practice on classification of knowledge points

Knowledge point 1 The three elements of force and the schematic diagram of force

1. The ______, ______, and _______ of force are called the three elements of force, and they affect the ________ of force.

2. As shown in Figure 7-1-4, push the door with the same amount of force at points A, B, and C. You can feel that it is easy to push the door open at point A. This shows that the effect of force is related to which of the following factors ( )

A. point of action of force

B． Magnitude of the force

C. direction of force

D． unit of force

3． As shown in Figure 7-1-5, the same spring is pulled and pressed with equal forces. This experiment shows that the effect of spring force is related to the force ( )

A. Size related B. Related to the point of action

C. Direction related D. All three are related

4. In Figure 7-1-6, draw a schematic diagram of a horizontal pull force of 6 N to the right that is exerted on a car on a level ground.

Knowledge point 2 The effects of forces are mutual

5. As shown in Figure 7-1-7, the people in one boat pushed the other boat away, and found that the two boats moved in opposite directions at the same time. This phenomenon shows that force can change the ________ of an object; the effect of force between objects is _____.

6． The action of force is mutual. Among the following phenomena, this principle is not used: ()

A. When the boat is moving forward, use an oar to paddle backwards

B． When a person runs forward, he or she should push backward and downward.

C. When the rocket takes off, the jet should be directed downwards

D． When heading the ball towards the goal, head the ball hard towards the goal

Li PPT, the second part of the content: Comprehensive training with regular methods

7. Which of the following statements is wrong ( )

A. When pulling a cart, the horse pulls the cart forward, and the cart pulls the horse backward.

B． The football player heads the ball and the direction of the ball changes, which shows that force can change the state of motion of an object

C. A person is sitting on a sofa and the sofa is concave, which shows that force can change the shape of an object

D． Put a magnet close to an iron nail. The magnet will be attracted to the iron nail, but the iron nail will not be attracted to the magnet.

8. We often use the phrase "an egg hits a stone" to describe the disparity in power between the two opposing sides. The egg (the weak one) can easily be hit to a bloody head, while the stone (the strong one) remains intact. The correct explanation for this phenomenon is ( )

A. The egg is acted upon by a force, but the stone is not acted upon by a force

B． The egg is acted upon by a larger force and the stone is acted upon by a smaller force

C. The force they interact with is the same, but the stone is harder than the egg.

D． None of the above statements are correct

9. As shown in Figure 7-1-8, object A is placed on the horizontal ground. Someone uses a force of 200 N to pull the object upward to the right at an angle of 45° to the horizontal direction. Please use a schematic diagram of the force to represent this force.

Power PPT, the third part: practical practice of high-frequency test questions

10．2018·Xuzhou As shown in Figure 7-1-9, Xiaohua pulls the car with a rope to walk. Please draw a schematic diagram of the pulling force F of the rope on the car.

Keywords: Free download of PPT courseware for the second volume of eighth-grade physics published by the People's Education Press, PPT download, .PPT format;

For more information about the "Power" PPT courseware, please click on the Power ppt tab.

"Elasticity" force PPT:

"Elasticity" Force PPT Part 1 content: Basic knowledge points Knowledge point 1 Elasticity 1. When the rubber band is pulled hard, the rubber band will deform, and will return to its original shape when no force is applied, indicating that the rubber band has elastic deformation. 2. The basketball hits the backboard and is bounced back, causing the ball to bounce back.

"Power" Power PPT teaching courseware:

"Power" Power PPT teaching courseware Part 1: Classification practice of knowledge points Knowledge point 1 Power 1. Force is the effect of _______ on _______, its unit is _______, abbreviated as _____, and its symbol is ____. 2. When you press the spring with your hand, the spring is bent, and the force is exerted on the object...

"Power" Power PPT download:

"Force" Force PPT download Part 1: Complete explanation of textbook knowledge Knowledge point 1 Force 1. Concept: Force is the effect of an object on an object. There are two objects that act, one is the force-exerting object, and the other is the force-receiving object. In physics, force is represented by the letter F. 2.Unit:..

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Update Time: 2024-11-24

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 2 industry PPT template

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