"Motion and Stillness" Simple Movement of Matter PPT Courseware 4

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"Motion and Stillness" Simple Movement of Matter PPT Courseware 4

1: Movement is a common phenomenon in the universe

Cars running on the road;

Students playing football on the playground;

flying fireflies;

Meteors piercing the night sky;

Houses\Bridges\Trees\Mountains

2: Mechanical movement

Definition: The change of the position of one object relative to another object is called mechanical motion.

Ask students to give examples, which objects are making mechanical motion? Which objects are stationary? Why?

think:

1. Li Ming is walking towards school with his schoolbag on his back. Is Li Ming moving or stationary? Where's the schoolbag?

Li Ming’s position in school __ Li Ming is athletic

Schoolbag to Li Ming Position ＿＿ The schoolbag is stationary

2. Xiao Wang rides a bicycle on the street. Is the bicycle moving or stationary? Where is Xiao Wang?

Bicycle position on the ground ＿＿The bicycle is in motion

Xiao Wang's position on the bicycle ＿＿Xiao Wang is stationary

Reference object: When describing whether an object is moving or stationary, the object selected as the standard is called the reference object.

Describing the motion of the same object, if different objects are selected, the conclusions will generally be different.

Depending on the reference object selected, the movement and rest of the object will be different; it can be seen that the movement and rest of the object are relative.

Movement is absolute;

Two moving objects are relatively stationary

If two moving objects move in the same direction at the same speed and their positions remain relatively unchanged, then the two moving objects are relatively stationary.

Thinking: In the 4*100m relay race, how can the taker catch the baton accurately?

Think: Now can you explain the story of the pilot catching the bullet?

Classification of sports

Straight line motion: The path an object takes is a straight line.

Curved motion: The path an object takes is a curved motion.

Think: Can you give examples of curved motion and linear motion in life?

Thoughts and Practice

In a train traveling vertically, the apple placed on the small table of the carriage moves relative to which of the following objects? ( )

A. The locomotive of this train;

B. Passengers sitting on chairs in the carriage;

C. The conductor walking by;

D. Closed car door;

Students are sitting in the classroom. Using the classroom as a reference, you are _____. Using the sun as a reference, you are _____. Using the bird flying by the window as a reference, you are ______. of;

The moon moves through the white lotus-like clouds. The moon is moving based on ____

A small bamboo raft in the middle reaches of the river, walking on both sides of the towering green mountains. The bamboo rafts are moving, and ____ is used as a reference. The green mountains are moving, and ____ is used as a reference.

Practice and inquiry

In the American movie "Speed", a speed control bomb was installed by terrorists on a moving bus. The bomb will automatically detonate as long as the vehicle speed is lower than 50km/h. How to safely evacuate the passengers on the bus?

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For more information about the PPT courseware "Simple Movement of Matter, Motion and Rest", please click on the "Simple Movement of Matter ppt, Motion and Rest ppt" tab.

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"Motion and Stillness" Simple Movement of Matter PPT Courseware 5:

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Update Time: 2024-11-22

This template belongs to Physics courseware Beijing Normal University eighth grade physics volume one industry PPT template

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