"Exploration - Comparing the Speed ​​of Movement of Objects" Simple Movement of Matter PPT Courseware 5

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"Exploration - Comparing the Speed ​​of Movement of Objects" Simple Movement of Matter PPT Courseware 5

Under normal circumstances, which of the above three means of transportation runs faster?

To compare the speed of movement in physics, the audience method is used and an important physical quantity - speed is introduced.

A: A car travels 2000m in 200s

The distance traveled by the car in 1 second is 2000m/200s=10m

B: The plane moves 1000m in 2 seconds

The distance traveled by the airplane in 1 second is 1000m/2s=500m

1: What is speed?

In physics, the distance an object travels through is called speed.

2: Calculation and formula of speed

Speed=distance/time V= S/t

In SI units, its base unit is "meter/second"

Read as meters per second

The symbol is "m/s"

Example: When the car passes a certain station, the pointer of the passenger's watch points to exactly 09:30:00. When it passes the next station, it is already 09:32:18. It is known that the distance between the two stations is 2.07km, find the speed of the car.

Known: S=2.07km=2070m

t=2 minutes and 18 seconds=138 seconds

Find: v=?

Solution: From the speed formula

V=s/t =2070m/138s=15m/s

Answer: The speed of the car is 15m/s.

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"Exploring and Comparing the Speed ​​of Movement of Objects" Simple Movement of Matter PPT Courseware 6 Activity: Compare the speed of falling pieces of paper Discuss: 1. How to compare the speed of their movement? Let them be released at the same time from the same height. The piece of paper that hits the ground first moves faster (the same distance is faster than...

"Exploration - Comparing the Speed ​​of Movement of Objects" Simple Movement of Matter PPT Courseware 4:

"Exploring and Comparing the Speed ​​of Movement of Objects" Simple Movement of Matter PPT Courseware 4 Question 1 In a 100-meter race, athlete A completes the distance in 10 seconds, and athlete B completes the distance in 11 seconds. Which athlete runs faster? Question 2: Car A travels 80km in 2 hours, and Car B...

"Exploration - Comparing the Speed ​​of Movement of Objects" Simple Movement of Matter PPT Courseware 3:

"Exploring and Comparing the Speed ​​of Movement of Objects" Simple Movement of Matter PPT Courseware 3 Classified according to the shape of the motion route: Linear motion Curved motion is classified according to whether the speed changes: Uniform motion Variable speed motion In a 100-meter race, how do spectators compare the speed of athletes? ?Cutting..

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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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