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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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"Exploration - Comparing the Speed of Movement of Objects" Simple Movement of Matter PPT Courseware 6:
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"Exploration - Comparing the Speed of Movement of Objects" Simple Movement of Matter PPT Courseware 4:
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"Exploration - Comparing the Speed of Movement of Objects" Simple Movement of Matter PPT Courseware 3:
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