"Why Apple Landed" PPT courseware

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"Why Apple Landed" PPT courseware

Part One: Earth’s Gravity

It is said that one day in 1666, Newton was lying in the garden meditating. Suddenly, a ripe apple fell from the tree and hit him on the head. He thought of a question: "Why do apples always fall to the ground and not to the sky?"

Newton believed that some invisible force pulled the apple toward the ground. This force came from the earth.

Newton called this force that the earth pulls objects around it toward the ground "gravity."

Newton called this force on an object itself due to the attraction of the earth gravity.

Part 2: What is gravity

What is gravity? Which direction is the direction of gravity?

Answer: The force exerted on an object due to the attraction of the earth is called gravity. The direction of gravity is always vertically downward, toward the center of the Earth.

How to use the dynamometer

1 Observe whether the pointer points to the 0 scale line in the natural state

2. Check whether the dynamometer is stuck. Pull the spring hook to see if it is flexible.

3. Hang the object on the spring dynamometer so that the action line of the dynamometer force is in the same straight line as the spring expansion direction (otherwise it will cause inaccurate measurement), and wait for the pointer to stabilize and take the reading!

Precautions

1. Do not use a spring dynamometer to measure forces exceeding its range, otherwise the spring dynamometer will be damaged.

2. When reading, look directly at the pointer. Looking up or down will increase the measurement error!

Part Three: Practice to meet standards

1. Any object on or near the Earth is affected by ______. The force exerted on an object due to the attraction of the earth is called "______" and its direction is ______.

2. We stand on the ground, jump up, and eventually fall back to the ground because we are affected by ______.

3. Who was the first person to think about why Apple came to fruition? Collect information and tell his story.

4. There are many "apple falling to the ground" phenomena in life, let's talk about it.

5. How do people use and overcome the gravity of the earth in life? for example.

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For more information about the "Why Apple Landed" PPT courseware, please click the "Why Apple Landed" ppt tag.

"Why Apple Fell" PPT download:

"Why the Apple Falls to the Ground" PPT Download Part One: Understanding Gravity and the Dynamometer Newton's explanation is that any object on or near the earth will be affected by the earth's gravity. The force exerted on the object due to the earth's attraction is called gravity. The square of gravity...

"Why Apple Fell" PPT:

"Why the Apple Falls to the Ground" PPT Part 1: Gravity Any object on or near the earth will be affected by the earth's gravity. The force exerted on objects due to the attraction of the earth is called gravity, and its direction is vertically downward. Instructions for use and notes...

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Update Time: 2024-11-01

This template belongs to science courseware Qingdao Edition Fourth Grade Science Volume 1 industry PPT template

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