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Authoritative PPT Summary
"Measurement of Average Speed" Simple Movement of Matter PPT Courseware 2
Parts of scientific inquiry:
1.Ask a question
2. Conjectures and Assumptions
3. Make plans and design experiments
4. Conduct experiments and collect evidence
5.Analysis and demonstration
6.Evaluation
7. Communication and cooperation
Explore the movement of the car on the slope
Asking a question is more important than solving a problem.
Ask a question:
How does the speed of the car change as it slides down the slope?
via caculation
The second half of the journey S3= S1-S2 and
In the second half of the period t3=t1-t2
Calculate the average speed v3 of the car through the second half of the journey.
Move the metal piece to the midpoint of S1, measure the time t2 it takes for the car to slide from the top of the slope through the upper half of the slope S2, and calculate the average speed v2 of the car through the upper half of the slope.
【Analysis and Demonstration】
v2
The speed of the car sliding down the slope is getting faster and faster, which means that the car is moving faster and faster along the slope.
【in conclusion】
The car slides down the slope faster and faster
Class summary
1. The link of scientific inquiry
2. The average speed of the car moving on the slope (analysis process)
3. Experiment report format
Consolidation exercises
1. An object moves along a straight road, accelerates from rest to 20m/s in 10s, and moves a total of 80m. The average speed of the object in 10s is [ ]
A. 20m/s b． 10m/s
C. 8m/s D. None of them are right
2. When a car moves in a straight line, it travels at a speed of 20m/s for the first half of the distance and 30m/s for the second half of the distance. During the entire distance, the average speed of the car is _____m/s
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"Measurement of Average Speed" Simple Movement of Matter PPT Courseware 3:
"Measurement of Average Speed" Simple Movement of Matter PPT Courseware 3 Knowledge Review How many methods are there to compare the speed of an object's motion? What is the physical meaning of speed? What is the definition? Unit of speed, formula. What is uniform linear motion? Find the common factor of average speed..
"Measurement of Average Speed" Simple Movement of Matter PPT Courseware:
"Measurement of Average Speed" Simple Movement of Matter PPT Courseware [Experience] Changes in the speed of moving objects and average speed Activity 1: Feel the change in speed while riding a bicycle freely down a slope. Activity 2: Xiao Ming is testing the 100-meter race on the playground. (1)..