"The Function of the Rubber Cover on the Pen Holder" PPT courseware

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Fourth-grade science volume 2 of the E-education edition	pptx	6 MB

"The Function of the Rubber Cover on the Pen Holder" PPT courseware

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Upload Time: 2024-11-22

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"The Function of the Rubber Cover on the Pen Holder" PPT courseware

Think about it: why does every pen have a rubber cover on the barrel?

When an object moves on the surface of another object, friction will occur at the contact surface of the two objects. The moving object will experience a force that hinders its movement. This force is called friction.

How to measure the amount of friction:

We use a spring dynamometer to pull an object along the horizontal direction. The force just enough to make the object move is equivalent to the friction force it experiences.

The relationship between friction force and contact surface condition

Speculation: The surface of an object is smooth and the friction is small. The surface of an object is rough and the friction is large.

Conditions to change: Smooth tabletop vs. rough tabletop

Conditions that do not change: weight of the object, speed of pulling

Conclusion: The contact surface between objects is smooth and the friction is small; the contact surface between objects is rough and the friction is high.

Keywords: teaching courseware on the role of the rubber cover on the pen holder, download the science PPT courseware for the second volume of the fourth grade in the E-education edition, download the science slide courseware for the fourth grade, download the PPT courseware on the role of the rubber cover on the pen holder, .PPT format;

For more information about the PPT courseware "The Function of the Rubber Cover on the Pen Holder", please click on the "The Function of the Rubber Cover on the Pen Holder" ppt tag.

"The Function of the Rubber Cover on the Pen Holder" PPT Courseware 2:

"The Function of the Rubber Cover on the Pen Holder" PPT Courseware 2 Think about it: Do you prefer to use a ballpoint pen with a rubber cover or one without a rubber cover? Why? Comparative test: Activity 1: Prepare two identical pens with rubber sleeves on the pen barrels, and remove the rubber sleeve from one of the pens..

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Update Time: 2024-11-22

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The role of the rubber cover on the pen barrel ppt

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"The Function of the Rubber Cover on the Pen Holder" PPT courseware