"Integration of this Chapter" Motion and Force PPT

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"Integration of this Chapter" Motion and Force PPT

High School Entrance Examination Focus Experience

1. (2018 Hunan Changsha High School Entrance Examination) In 2018, the "Beijing 8 Minutes" at the closing ceremony of the Pyeongchang Winter Olympics amazed the world. In the beautiful light and shadow, the ice boys and the intelligent robots danced to the music, 20 The movements of multiple robots are uniform, precise and graceful, complementing the dancing boys. Regarding the performing robot and the boy on ice, which of the following statements is correct ()

A. When the robot slides in a curve, its motion state does not change.

B. When the robot moves on the ice, it is not affected by force.

C. Compared to the audience in the stands, the gliding robot is moving.

D. Compared to his own skates, the skating boy is in motion.

2. (2018·Shandong Linyi High School Entrance Examination) As shown in the figure, the block placed on the horizontal table is connected to the sand bucket through a pulley with a thin line. When the total mass of the sand bucket and sand is m, the block happens to move in a straight line with uniform speed. motion (ignoring the friction between the string and the pulley). The following statement is correct ()

A. The sliding friction force experienced by the object is mg.

B. The gravity of the object and its pressure on the table are a pair of balancing forces

C. The sliding friction force and supporting force on the block are a pair of balancing forces

D. Continue to add sand to the sand bucket, and the sliding friction force on the block increases.

3. (2018·Zhejiang Hangzhou High School Entrance Examination) As shown in the figure, on a horizontal ground with the same roughness, a block weighing 30 N is acted upon by a horizontal pulling force of F=10 N at section AB, and moves in a straight line at a uniform speed to the right to B. When the horizontal pulling force is removed, the block continues to move and comes to rest at C. Which of the following statements is correct ()

A. The block in section AB receives a horizontal rightward friction force of 10 N.

B. The block in segment AB receives a horizontal friction force to the left, with a magnitude of 20 N.

C. The block in segment BC receives a horizontal friction force to the left with a magnitude of 10 N.

D. At point C, the block experiences a horizontal rightward friction force of 30 N.

4. (2017·Jiangsu Nantong High School Entrance Examination) Among the following examples, the one that needs to prevent the harm caused by inertia is ()

5. (2017 Shandong Tai'an High School Entrance Examination) The picture on the right is a schematic diagram of pressing a wooden block against the wall with force F.

①The pressure of the hand on the wooden block and the elastic force of the wall on the wooden block are a pair of balancing forces

②The pressure of the hand on the wooden block and the gravity of the wooden block are a pair of balancing forces

③The friction force on the wooden block and the gravity of the wooden block are a pair of balancing forces

④The pressure of the hand on the wooden block and the elastic force of the wooden block on the opponent are a pair of balancing forces

The above statement is correct ()

A. Only ② is correct B. Only ④ is correct

C. Only ③④ is correct D. Only ①③ is correct

6. (2017·Zhejiang Lishui Entrance Examination) Fingertip spinner is a very popular toy at present. The toy has a bearing in the middle, and there are balls in the bearing. There are three flying leaves made of denser metal on the side. After the leaf, the flying leaf can rotate around its axis on the fingertip for a long time (as shown in the picture). The following analysis is wrong ()

A. The speed of the flying blades slows down and the inertia remains unchanged.

B. There are balls in the bearing to help reduce friction.

C. The flying leaves start to rotate after being moved because force can change the motion state of the object.

D. The pressure of the top on the fingertips and the support force of the fingertips on the top are a pair of balancing forces

Keywords: Free download of PPT courseware for the second volume of eighth-grade physics published by the People's Education Press. This chapter integrates PPT downloads, motion and force PPT downloads, .PPT format;

For more information about the PPT courseware "Motion and Force Integration in this Chapter", please click the "Motion and Force ppt Integration in this Chapter" ppt tag.

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Update Time: 2024-11-25

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

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