The second day of the first volume of physics examination questions.
1. Multiple choice questions (3 points for each small question, 30 points for * * *)
1. The following phenomenon that does not belong to mechanical movement is ()
A. a spring river flows eastward. B.the stars shine. C. rushes. Spring breeze caresses your face.
2. The following estimate is most in line with the actual situation ().
A. The walking speed of human is about 5m/s b, and the new 2B pencil is about 18cm long.
C. The height of the desk is about1.5 m d. The thickness of a test paper is about1mm.
3. Regarding motion and stillness, the following statement is true ()
A. When the tanker refuels the receiver in the air, they are in relative motion.
B. When trucks and combine harvesters harvest crops, they are in relative motion.
C. When the two cars are driving on the track, they are relatively stationary.
D. When Tiangong-1 and Shenzhou-8 docked successfully, they were relatively static.
4. A sprinter runs 50m in 5s, the car speed is 54km/h, and the antelope speed is 20m/s, so the order of the three speeds from small to large is ().
A. athletes, cars and antelopes
C. Antelopes, cars and athletes D. Athletes, antelopes and cars
5.2011165438+1On October 9th, China's first Mars probe "Firefly-1" was launched in combination with the Russian "Phobos-1" detector. In the process of bundled launch, which of the following objects is taken as the reference object, "Firefly-1" is stationary ()
A.b. Phobos probe C. Sun D. Mars
6. The following statement about mistakes is true ()
A. careful measurement can avoid errors. B. Failure to observe the operating rules in the measurement process will lead to errors.
C. the measurement error is too large. D. Errors in measurement can be avoided, but they are inevitable.
7. Figure 4 (A) is an s-t image of the object moving, so the corresponding v-t image in Figure 4 (B) is ().
8. Li Jun's home is 600 meters away from the school. One day at school, he walked the first half of the distance at the speed of1m/s. In order not to be late, he walked the second half at the speed of 1.5 m/s, and the average speed of his walking at school was ().
1.2m/sec b1.25m/sec c2m/sec D.2.5/sec
9. Objects move in a straight line at a uniform speed. According to the velocity formula, the () of an object
A. the speed is constant. Speed is proportional to distance.
C. speed is inversely proportional to time d, and all the above statements are true.
10. The following picture shows the speedometer on the car. A car travels from Yuping to Guiyang at this speed. If the distance from Yuping to Guiyang is about 3.2× 105m, then ().
A.the speed of this car is 80 meters per second.
C. The speed is 80 km/s d, and it only takes 4 hours to get to Guiyang.
2. Multiple choice questions (3 points for each question, 9 points for * * *)
1 1, the following statement is incorrect ()
A. The so-called reference object refers to an absolutely motionless object.
B To study the motion of an object, it is most appropriate to choose the sun as the reference object, because the sun is a truly immobile object.
C. When describing the motion of the same object relative to different reference objects, the results will inevitably be different.
D. it is convenient to study the movement of astronauts in the spacecraft and choose the spacecraft as a reference.
12. Three objects, A, B and C, start to move in a straight line at the same time, place and direction. The speed of a and c is the smallest. Their s-t image is shown in Figure 2. After moving for 5 seconds, the distance between A and B is more than 2 meters. The following statement is correct ().
A.a, b and c all move in a straight line at a constant speed. The s -t diagram of B.A. may be line A.
The s-t diagram of C.B. must be line B. The s-t diagram of D.C. may be line C.
13, the following method of measuring length, the correct is ().
A. To measure the thickness of a piece of paper, you can first measure the thickness of dozens of pieces of paper with a scale, and then divide by the total number of sheets to get the thickness of a piece of paper.
B. Measure the diameter of the metal wire, that is, the metal wire can be tightly wound on the pencil for several times without gaps, and measure the length L and the number of turns N of the tightly wound part so that the diameter D = L/N..
C. To measure the distance traveled by a bicycle, you can first record the number of revolutions n of the wheel, and then multiply it by the circumference l of the wheel.
D, the diameter of table tennis can be accurately measured with only one ruler without other tools.
3. Fill in the blanks (2 points for each blank, ***24 points)
14, "Rising Sun" is the reference object, and "Sunset West Mountain" is the reference object.
15, an object moving in a straight line at a uniform speed passes through a distance of 300 m in 2 minutes, and its speed is _ _ _ _ _ _ _ _ m/s, and the speed of this object in the first 10 s is _ _ _ _ _ _ _ _ m/s. 。
16. Complete the following unit conversion.
(1) 50m = _ _ _ _ _ _ km (2) 36km/h = _ _ _ _ _ m/s (3) 0.6min = _ _ _ _ _ _ _ hours.
17. Xiao Cong's family went to Beijing for a trip. At the intersection of Beijing suburban highway, he saw the traffic sign as shown at the lower right. The number "40" on the sign means _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
18.A, B and C are moving in the same direction at the same time, and their moving images are shown in the figure. As you can know from the picture, the car with the same speed is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
( 18) ( 17)
4. Experimental problem (4 points +2 points +9 points = 15 points)
19. As shown in figure 1, the scale value of the scale is _ _ _ _ _, and the length of the block is _ _ _ _ _ cm.
20. Look at the picture, as shown in the figure: measure the results of the women's 1500m competition in the school sports meeting with a stopwatch. The time from the beginning to this moment is _ _ _ _ _.
( 19)
2 1. A physics interest group "measures the average speed of the trolley" with a graduated inclined plane, a trolley and a digital clock, as shown in figure 15. The figure shows the three positions of the car in A, B and C and the corresponding time when it is measured. The format of the time display is "hours: minutes: seconds".
(1) Please complete the following table according to the chart.
Cars from a to b cars from a to c
0.9 square meters away
Time t/s 2
Average speed v/ (m/s)
(2) Analyzing the data in the table, does the car move in a straight line at a uniform speed?
(3) The slope of the inclined plane used in this experiment should be _ _ _ _ _ _ (choose "big" or "small").
(4) The measuring tools used in this experiment are _ _ _ _ and _ _ _ _.
V. Calculation problem (6 points +8 points = 14 points)
22. A train is 200m long and passes through a bridge with a length of 1.8km at a speed of 72km/h at a uniform speed. How long does it take for all the trains to cross the bridge?
23. In recent years, the roads in an urban area and surrounding towns have been successively converted into first-class and second-class highways, which has greatly promoted economic development and brought convenience to people's travel. Unfortunately, at some intersections, traffic accidents involving people and vehicles have increased. Some people suspect that the accident is related to the wrong judgment of pedestrians crossing the road:
(1) As shown in the figure, a classmate was about to cross the road, and a car just came from the fork in the road at a speed of 72 km/h 100 m. If the road is wide 12m, can he completely cross the road at a walking speed of 1.5m/s before the car reaches the fork in the road?
(2) In order to reduce the collision between people and vehicles at the fork in the road, please put forward two reasonable suggestions to the traffic police department (or highway construction department), car drivers or passers-by.
Six. Comprehensive ability questions (8 points)
24. A classmate's father and family drove to Fisherman's Wharf in Taihu Lake. When passing Taihu Road, a kitten jumped out of the roadside. He braked urgently to avoid hitting it. The picture shows the time-speed image of the car before and after emergency braking. What information can you get from the picture (write at least two)
( 1)____________________________________________________
(2)________________________________________________________
Reference answers to physics test questions in the first volume of the second day of junior high school
One or two multiple-choice questions
1 2 3 4 5 6 7 8 9 10 1 1 12 13
British Broadcasting Corporation
Step 2 fill in the blanks
Three. 14. Mountains in the west of the earth15.2.52.516.0.0510.01
17. The fastest driving speed is 40km/h 1.5 18. A, C and B.
Four. Experimental problem
1 19. 1mm 1.8420.5 min 10s 2 1。 (1) 0.2660.130.15 (2) No.
(3) Small Scale (4) Stopwatch
Verb (abbreviation of verb) calculation problem
22. 100
23.( 1) No.
(2) At the intersection, slow down; Please obey the traffic rules and drive according to the lights.
On the comprehensive ability of intransitive verbs
24.( 1). The emergency braking occurred at 8: 27.
(2) He drove at a constant speed from 8: 23 to 8: 27.
(3) Drive at a speed of 60 km/h from 8: 20 to 8: 30.
(4)。 He drove at a constant speed from 8: 20 to 8: 23.
Do you need to study physics in advance in senior two?
You need to decide according to your own situation.
1. If you like physics, are interested in physics and have a certain mathematical foundation, you can study physics in advance;
2. If you are going to start studying physics in a comprehensive way in junior high school, take physics as your dominant subject and let yourself occupy the commanding heights of physics learning ahead of your peers, then study physics in advance;
3. Physics knowledge in junior high school and senior high school is a complete system. If you study physics in advance, even in junior high school, you can get in touch with senior high school physics knowledge, so you can understand physics knowledge more deeply. Secondly, you can lay a more solid foundation for high school physics.
How to learn physics in the second day of junior high school to learn it well
1, preview.
Before learning physics, preview the basic knowledge in the textbook in advance, and those with supporting training can do exercises that are previewed before class. In this way, we can have a preliminary understanding of this lesson and be very helpful in learning new lessons.
2. take notes.
Taking notes is to help you understand the important and difficult points, so that you can review them later, that is, to record the traces of class. Don't be lazy. Learning is the most taboo.
3. practice.
This study is like cooking. For example, I teach you how to cook braised pork, the first step, the second step, and then show you step by step. You have written it down in your notebook. But did you just say that you can cook braised pork? Obviously not. You have to do it yourself several times before you can really turn what I said into your own. Therefore, learning is the same, we must do more exercises, and this exercise must be as early as possible. The so-called strike while the iron is hot, don't wait until you forget, the effect will be very poor.
4. review.
There is a famous Ebbinghaus memory forgetting curve in pedagogy, which tells people that forgetting in learning is regular, and the process of forgetting is fast, first fast and then slow. Observing the curve, you will find that after one day, if you don't review quickly, only the original 25% will remain. As time goes on, the speed of forgetting slows down and the number of forgetting times decreases.
5. Be able to repeat knowledge points.
For example, after one class, you can talk about the knowledge points of this class. After the second class, you can repeat the knowledge points of the first two classes. After learning this chapter, you can repeat that chapter. Hang in there. After learning a book, you can retell the knowledge points of a book. The knowledge frame and knowledge points are all in your mind. How can you not learn physics well?
6. Can use the wrong questions.
You spend time practicing. Wrong questions are your weakness. The wrong questions may not be sorted out, but they must be marked with heavy colored pens. When reviewing before the exam, you should focus on reviewing these to avoid repeating the same mistakes and help you get high and full marks!
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