"Experiment: Explore the relationship between the elastic force and elongation of the spring" Interaction PPT

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"Experiment: Explore the relationship between the elastic force and elongation of the spring" Interaction PPT

The first part of the content: [Learning literacy·clear goals]

Physical concepts: 1. Explore the relationship between spring elongation and elastic force. 2. Learn to use list method, image method, and function method to process experimental data.

Experiment to explore the relationship between the elastic force and elongation of a spring PPT, the second part of the content: independent preview to explore new knowledge

1. Experimental principles and methods

1. Measuring the elastic force F of the spring using the suspension method

When the hook code hung at the lower end of the spring is _____, the elastic force is equal to the gravity of the hook code, that is, F = mg.

2. Measure the extension of the spring x

The original length l0 of the spring and the length l of the spring after the hook is attached can be measured using _____, and its elongation x = _____.

3． Explore the relationship between elastic force and spring elongation

Establish a coordinate system, use the ordinate to represent the elastic force F, and use the abscissa to represent the elongation of the spring x. Draw the points corresponding to each set of (x, F) measured in the experiment in the coordinate system, and connect them with smooth curves. , based on the graph obtained from the experiment, the relationship between elastic force and spring elongation can be ascertained.

2. Experimental equipment

Iron stand, spring with hook at the lower end, hook code, scale, and graph paper.

3. Experimental steps

1. As shown in the figure, fix the upper end of the spring on the iron stand, and fix a scale next to the spring. The zero mark of the scale coincides with the upper end of the spring. Read the original length l0 of the spring and fill it in the table below.

2. Hang a hook code under the spring and measure the total length of the spring l1. Then hang a hook code under the spring and measure the total length of the spring l2... The total length of each spring is included in the corresponding table below.

3． Calculate the gravity of each hook code based on its mass. The elastic force of the spring is equal to the gravity of the hooked code, that is, F1=mg, F2=2mg, F3=3mg... Fill in the corresponding table below with the elastic force of each spring.

4. Data processing

1. image method

Take the elastic force F (which is equal to the gravity of the hooked code) as the ordinate and the extension x of the spring as the abscissa, and use the point tracing method to draw the graph. Connect the points to get a graph of the elastic force F as a function of the spring extension x. It can be found that the Fx graph is a _____ straight line.

2. functional method

The elastic force F and the extension x of the spring should satisfy the relationship of function F = _____.

5. Error analysis

6. Precautions

1. The hook should not be too heavy to prevent the spring from exceeding its _____.

2. The quality difference of the hooked codes should be as large as possible each time, so that the spacing between points drawn on the coordinates should be as large as possible, so that the drawings drawn in this way are more accurate.

3． When measuring the length of the spring, be sure to measure it when the spring is suspended _____ and in the _____ state.

4． When recording data, pay attention to the corresponding relationship and units of elastic force and spring elongation.

5. Try to use lightweight springs so that the effects of _____ can be ignored.

Experimental exploration of the relationship between the elastic force and elongation of a spring PPT, the third part of the content: cooperative exploration to overcome difficult problems

[Example 1] In the experiment of "exploring the relationship between the elastic force and the elongation of the spring", a student first hung the spring naturally. When the spring was stationary, the length was recorded as L0; then when a weight plate was hung on the lower end of the spring, the length Record it as Lx; add 10 g of weight each time to the weight pan, and record the length of the spring in sequence;

(1) As shown in the figure, the student made an image based on the recorded data. The vertical axis is the mass of the weight, and the horizontal axis is the difference between the spring length and ________ (fill in "L0" or "Lx").

(2) It can be seen from the figure that the stiffness coefficient of the spring is ________N/m.

[Example 2] When a student was exploring the relationship between elastic force and spring elongation, he designed an experimental device as shown in Figure A. He first measured the natural length of the spring without hooks, then hung 1, 2, 3, 4, and 5 hooks on the lower end of the spring. When it was still, the corresponding total length of the spring was measured. The mass of each hook code is 10 g. The experimental data are shown in the table below. (The elastic force never exceeds the elastic limit of the spring, g is 10 N/kg)

(1) Based on these experimental data, try to draw a graph of the functional relationship between the elastic force F of the spring and the total length l of the spring on the graph paper shown in Figure B.

(2)The physical meaning of the intercept of the image on the l-axis is ________. The stiffness coefficient of the spring is k=________N/m.

Experimental exploration of the relationship between spring elastic force and elongation PPT, part 4 content: class drills to improve literacy

1. In the experiment of "exploring the relationship between the elastic force of a spring and its elongation", the following statement is correct ()

A. When a spring is stretched, it can exceed its elastic limit

B. Use the hanging hook method to apply tension to the spring. Make sure the spring is in a vertical position and in a balanced state.

C. Use a ruler to measure the length of the spring, which is the elongation of the spring.

D. Use several different springs to measure several sets of tension and elongation. It is concluded that the ratio of tension to elongation is equal.

2. A student used the device in Figure (a) to conduct an experiment to "explore the relationship between the elastic force of a spring and its length."

(1) Through experiments, he obtained the relationship between the elastic force F and the spring length x as shown in Figure (b). From this graph, the original length of the spring x0=________ cm and the stiffness coefficient k=________N/ m.

(2) He also used the experimental principle to make the spring into a spring balance. When the indication on the spring balance is as shown in Figure (c), the length of the spring is x=__________ cm.

3． Picture A shows an experimental scenario where a student used a force sensor to explore the relationship between the elastic force and elongation of a spring. Pull the force sensor vertically downward on the light spring fixed on the iron stand, and read the scale scale x and the pulling force F under different pulling forces (read directly from the computer). The resulting data is recorded in a table:

Pulling force F/N 0.45 0.69 0.93 1.14 1.44 1.69

Scale x/cm 57.02 58.01 59.00 60.00 61.03 62.00

Keywords: Free download of the PPT courseware of Lu Ke Edition High School Physics Compulsory Course One, experimental exploration of the relationship between the elastic force and elongation of the spring PPT download, interaction PPT download, .PPT format;

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Update Time: 2024-09-19

This template belongs to Physics courseware Lu Ke Edition High School Physics Compulsory Course One industry PPT template

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