"Elastic Force Spring Dynamometer" Force and Motion PPT Courseware

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"Elastic Force Spring Dynamometer" Force and Motion PPT Courseware

Review the past and learn the new:

1. What is force?

Force is the action of an object on an object.

2. What are the functions of forces between objects?

In physics, push, pull, lift, pressure, repulsion, attraction, etc. between objects are usually called the effects of force.

3. What is the unit of force? What is the symbol?

The unit of force is Newton, or Newton for short, and its symbol is N.

4. What effects will occur when an object is acted upon by a force?

(1) To change the shape of an object;

(2) Change the motion state of the object.

practise:

1. A change in the shape of an object is called ______. The force that causes an object to deform is called ______. Tension, pressure, and supporting force all belong to ______.

2. In the figure below, the force represented is not elastic ( )

3. Which of the following statements about elasticity is correct ( )

A. As long as the object deforms, elasticity can be generated

B. As long as two objects are in contact, elastic force will be generated.

C. Only springs can generate elastic force

Observe the spring dynamometer and think about and answer the following questions:

1. What are the main structures of a spring dynamometer?

2. On what principle is the spring dynamometer made?

Within a certain elastic range, the greater the tension on the spring, the longer it stretches.

3. Observe what is the range and graduation value of this spring dynamometer?

4. Observe whether the pointer of this spring dynamometer points to the zero mark? If not, how to correct it?

Class summary:

What did you learn in this lesson?

(1) Elastic force: The force generated by the deformation of an object is called elastic force.

(2) Spring dynamometer

1. Main structure: spring, pointer, dial

2. Working principle: Within a certain elastic range, the greater the force on the spring, the longer it stretches.

3. Correct usage:

(1) Understand the measuring range;

(2) Clarify the graduation value;

(3), zero calibration;

(4) When measuring force, the axis direction of the spring in the dynamometer should be consistent with the direction of the force being measured, and the spring should not lean on the dial.

Apply what you learn and believe in yourself:

1. When trampoline athletes compete, they often rely on the ________ produced by the deformation of the trampoline to enable the athletes to jump higher and stretch their bodies to make graceful movements.

2. The most commonly used tool for measuring force in the laboratory is _________.

3. The spring dynamometer is made by utilizing the properties of ____________________. The scale of the spring dynamometer is ________ (fill in "uniform" or "uneven").

4. When using a spring dynamometer, first make the dynamometer's indication zero. This process is called ________. When measuring, the elongation direction of the spring and the direction of tension must be _________.

5. As shown in the figure, the measuring range of the spring dynamometer is ________N, the graduation value is ________N; the weight of the measured object shown by the pointer is ________N.

Innovate and develop, keep up the good work:

1. Question 2 of homework P87 in the textbook;

2. There is a spring dynamometer without a scale. The spring is intact and a 2N object. Can you accurately draw the scale on the dial? Please tell me your method steps.

Extracurricular exploration and self-transcendence:

According to the prompts in the "Mini Laboratory" on P86 of the textbook, make a rubber band dynamometer by yourself or with your classmates. Bring it to the next class and let's see who makes it simple, beautiful and accurate!

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For more information about the "Force and Motion Elastic Spring Dynamometer" PPT courseware, please click the Force and Motion ppt Elastic Spring Dynamometer ppt tag.

"Elastic Force Spring Dynamometer" Force and Motion PPT Courseware 2:

"Elasticity Spring Dynamometer" Force and Movement PPT Courseware 2 Think about it: pull the spring, rubber band and squeeze the plasticine and dough with force; after letting go, what is the difference in the result? Learning objectives (1) Know what elasticity is; (2) Be able to use a spring dynamometer correctly; ..

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Update Time: 2024-09-08

This template belongs to Physics courseware Lu Jiao Edition Eighth Grade Physics Volume 2 industry PPT template

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