"Measuring Average Speed" Mechanical Motion PPT Courseware 7

Description

"Measuring Average Speed" Mechanical Motion PPT Courseware 7

learning target:

Know how to measure average speed and what to pay attention to

Understand and appreciate the meaning and formula of average speed

Cultivate students' rigorous, serious and pragmatic attitude towards learning and inquiry

Measuring the average speed of an object

How does the speed of the car change as it slides down the slope?

【step】

1. Keep the slope at a certain slope, place the car at the top of the slope, place the baffle at the bottom of the slope, and measure the distance s1 that the car will pass.

2. Measure the time t1 from when the car slides down from the top of the slope to hitting the baffle.

3. Calculate the average speed v1 of the car throughout the entire journey through the slope based on the measured S1 and t1.

4. Move the baffle to the midpoint of S1, measure the time t2 it takes for the car to slide from the apex 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.

5. By calculation

The second half of the journey S3= S1-S2

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.

Class summary

The average speed of the car moving on the slope (analysis process)

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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File Info

Update Time: 2024-09-29

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

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