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★ Compulsory knowledge points of physics in senior one ★
★ Summary of Physics Learning Methods in Senior One ★
★ Summary of two compulsory knowledge points in senior high school physics ★
★ One-semester compulsory examination papers and answers for senior one physics ★
People's education printing plate senior one physics final examination paper
The first volume (multiple choice questions)
First, multiple-choice questions: 4 points for each small question, * * 40 points. Every little question has at least one correct answer.
1. Regarding the understanding of acceleration, the following statement is correct ().
A. the greater the speed, the greater the acceleration. B. the greater the speed change, the greater the acceleration.
C. the faster the speed changes, the greater the acceleration. D the direction of acceleration is the same as that of velocity.
2. Two objects A and B are on the same straight line, moving from the same position to the same direction at the same time, and their speed images are shown in the figure. The following statement is correct: ()
A. at first, b ran in front of a, and after 20s, b fell behind a;
B. At the end of B.20s, Party B catches up with Party A, and both parties are at the same speed;
At the end of c. c. 40s, B catches up with A;
Before D catches up, the two objects are farthest apart at the end of 20s.
3. An observer found that every once in a while, a drop of water fell from an 8-meter-high eaves, and when he saw that the fifth drop was about to leave the eaves, the first drop just fell to the ground. So, the height of the second fall from the ground at this time is: ()
2mb 2.5 MC 2.9 MD 3.5m
4. In the decomposition of known resultant force, there are multiple solutions ().
A, the direction of the two parts is known, and the size of the two parts is known.
C, know the size and direction d of one component, the size of one component and the direction of another component.
5. As shown in the figure, the object A is resting on an inclined plane, and the object A is pressed by a vertical downward external force. The following statement is true ()
The friction of object a may be reduced.
The pressure of object A on the inclined plane may remain constant.
C, no matter how F increases, object A always stays still.
D when f increases to a certain value, object a may slide down the slope.
6. As shown in the figure, the connector composed of m 1 and m2 moves along the rough slope under the action of tensile force F, and the dynamic friction coefficient between m 1 and m2 is the same, so the tensile force of m 1 on m2 is ().
A.B.C.D.7 The following statement is true ().
A. the greater the speed, the greater the inertia. B. the greater the mass, the greater the inertia.
C. the greater the external force, the smaller the inertia. D under the same external force, the faster the speed changes, the smaller the inertia.
8. The object remains stationary on a fixed inclined plane, and the correct one in the following statement is ().
A, gravity can be decomposed into downward force along the slope and pressure on the slope.
B, the downward component of gravity along the inclined plane and the static friction of the inclined plane on the object are a pair of balancing forces.
C, the pressure of the object on the inclined plane and the supporting force of the inclined plane on the object are a pair of acting force and reaction force.
D, the component of gravity perpendicular to the slope direction and the supporting force of the slope to the object are a pair of balancing forces.
9. As shown in the figure, the frame with the mass of m is placed on the horizontal ground, the upper end of a light spring is fixed on the frame, and the lower end is fixed with a ball with the mass of m. When the ball moves up and down, the frame never jumps. When the pressure of the frame on the ground is zero, the acceleration of the ball is ().
(m-m) g/m
Cubic centimeter (m+m) g/m
10. An object resting on a smooth horizontal plane is subjected to external forces F 1 and F2 in two horizontal directions at the same time, and the changes of F 1 and F2 are shown in Figure 3-6- 1, so the statement about the motion state of the object is correct ().
A. the speed is increasing in the same direction as F 1.
B. the speed decreases first and then increases, and the speed direction is the same as F 1.
C. The magnitude of acceleration increases first and then decreases, and the acceleration direction is the same as F 1.
D the magnitude of acceleration first decreases and then increases, and the acceleration direction is the same as F2.
Volume 2 (non-multiple choice questions)
Second, the experimental questions (* *18 points)
1 1.( 1) In the experiment of "parallelogram rule of verification force", the experimental result of a classmate is shown in the figure, where A is the thumbtack for fixing rubber strip, and O is the position where rubber strip connects with the string. The figure shows the theoretical value of the resultant force of F 1 and F2; Is the experimental value of the resultant force of force F 1 and F2. By comparing and, the parallelogram rule is verified.
(2) In the parallelogram rule of the verification force experiment, as shown in Figure 3, make the spring scale B slowly rotate 90 degrees clockwise from the position shown in the figure, and keep the position of the O point and the stretching direction of the spring scale A unchanged during this process, then the readings of the spring scales A and B will change to () in the whole process.
A.a increases, b decreases, B.a decreases, b decreases.
C.a decreases, B decreases first and then increases, and D.a decreases first and then increases.
12.( 1) The electromagnetic dot timer is a _ _ _ _ _ _ instrument using low-voltage _ _ _ _ power supply. If the power frequency is 50HZ, a dot will be struck every _ _ _ _ _ _ _.
(2) In the experiment of studying uniform linear motion, as shown in the figure, it is a paper tape that records the motion of the car at one time. In the figure, A, B, C, D, E, F and G are adjacent counting points, and the time interval between adjacent counting points is T=0. 1s, then the instantaneous speed of point C is m/s, and the acceleration of the car movement is a=m/s2 (the result keeps two digits).
SHIELD
1.3 cm
3 3. 10/0cm
5.38 cm
8.16cm
11.45cm.
15.26 cm
(3) After the dot timer is connected to a low-voltage AC power supply with a frequency of 50Hz, an experiment is conducted to measure the acceleration of linear motion with uniform speed and variable speed, and the obtained recording paper tape is as shown in the figure. O is the first trace laid by the point timer, the trace between OA is fuzzy, and A, B, C and D are several adjacent clear traces, from which the acceleration g=m/s2 can be obtained.
Third, the calculation question: **4 small questions, ***40 points. You must write the main text explanation, the basis for solving the problem, the formula, etc. Those who only write the final answer will not get extra points.
13. The car moves straight from point O to stop on the straight road, and after 9 seconds, it passes through point P to reach point Q.. Given that the distance between P and Q is 60m and the speed of cars passing through Q is 15m/s, then
(1) What is the acceleration of the car?
(2) What is the speed of the car passing through P?
14. An object starts to move in a straight line at a constant speed from rest, and immediately becomes a straight line at a constant speed when the movement displacement is 4m, until it is still. If the total displacement of the object is 10m, and the whole process takes 10s, find: (1) the acceleration of the object in the acceleration stage; (2) the acceleration of the object in the deceleration stage; (3) the speed at which the object moves.
15 ... As shown in the figure, a board with a mass of m is placed on a smooth slope with an inclination angle of q, and people with a mass of m run on the board, provided that their feet do not slip at the contact point.
(1) What acceleration should a person run at in order to keep the board stationary relative to the inclined plane?
(2) At what acceleration will the board move while keeping the position of the person relative to the inclined plane unchanged?
16. There is a stationary object on a smooth horizontal plane with a mass of m=2kg. If an object is pushed by a horizontal constant force F 1 with the magnitude of 3N for 4s, the object is pushed by a horizontal constant force F2 opposite to F 1, and the magnitude of the constant force F2 is 6n. The action time of F2 is also 4 s.
Reference answer
1- 10:ccdbcabdbcddac
1 1.( 1)F，F '，F，F'(2)C
12.( 1) AC, timing, 0.02 seconds, 0.50. (2)9.5
13. solution: (1)vt = V 0+ in a ≈1.67m /S2.
(2) when vt=5m/s, vt2 (squared) -v02 = 2.
14.( 1)0.5m/s2，(2)0.33m/s2，(3)2m/s
15. (1) (m+m) ghinq/m, the direction is downward along the inclined plane; (2)(m+M)gsinQ/M, the direction is downward along the inclined plane;
16.( 1)6m/s, opposite to F 1; (2) 12m； (3) ellipsis.
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