"Measuring Average Speed" Mechanical Motion PPT Courseware 4

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"Measuring Average Speed" Mechanical Motion PPT Courseware 4

Review and Discussion

1. What is the formula for speed and the meaning of each letter?

2. If you want to measure the average speed of an object, what physical quantities need to be measured? What measuring tools are needed?

3． How to use the scale? How to use stopwatch?

Move your hands: Practice using the stopwatch

The teacher releases a ping pong ball from a height. The students start timing when they hear the sound of the table tennis ball hitting the ground for the first time, stop timing when they hear the sound of the second hitting the ground, and compare the timing results.

Experimental steps: Page 23 of the textbook.

Notice:

1. The movement distance of the car is the distance from the front of the car to the front of the car.

2. The car must be released from rest from the top of the slope.

3． Do not change the slope of the incline during measurement.

(Two students in the same group completed it once each and compared.

Experimental conclusion and analysis:

discuss:

1. Are your data the same as other students? Why?

Are not the same. Because the slope of the slope and the selected distance are different.

2. How to find the average speed of the car in the second half of the entire journey?

3． Do you have any other findings or questions during the experiment?

Scalability experiments

Try the experiment:

1. Measure the speed of the car moving on the slope.

2. Measure changes in the speed of a person's walking.

Little information:

Due to the strong directivity of ultrasonic waves, slow energy consumption, and long propagation distances in the medium, ultrasonic waves are often used for distance measurement, such as distance meters and level measuring instruments, which can be achieved by ultrasonic waves.

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Update Time: 2024-11-22

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 1 industry PPT template

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