

Investigation 1.1- speed tracks
Presentation
•
Science
•
7th Grade
•
Medium
Standards-aligned
Sarah Melachrinos
Used 4+ times
FREE Resource
8 Slides • 8 Questions
1
Investigation 1.1- speed tracks

2
Graphs from tracks A and B
The slope of the line is how steep it is
Gráficos de las pistas A y B
La pendiente de la línea es lo empinada que es
3
The mathematical definition of the slope the change in y value divided by the change in x value
La definición matemática de la pendiente el cambio en el valor y dividido por el cambio en el valor x
4
The x value represents time, in seconds. The seconds always changed at a constant rate. The Y value, distance, was different for the tracks. That is why the slopes of the lines are different
El valor x representa el tiempo, en segundos. Los segundos siempre cambian a una velocidad constante. El valor Y, la distancia, era diferente para las pistas. Es por eso que las pendientes de las líneas son diferentes
5
Multiple Choice
Which graph has a steeper line?
¿Qué gráfico tiene una línea más empinada?
Track A
Track B
They are the same
6
Multiple Choice
Which graph represents a faster speed?
¿Qué gráfico representa una velocidad más rápida?
Track A
Track B
they were they same
7
Conclusion:
The steeper the slope of the graph, the faster the speed it represents
Cuanto más empinada sea la pendiente del gráfico, más rápida será la velocidad que representa
(Write this down)
8
Open Ended
Can you think of an equation to calculate speed?
¿Se te ocurre una ecuación para calcular la velocidad?
9
Equation to calculate speed:
10
for track A:
v=1s1m v=1m/sfor track B:
v=1s0.5m v=0.5 m/s
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For the tracks, we tried to keep a constant speed, but its nearly impossible to achieve a perfectly constant speed
We frequently find the Average speed, or the speed the car would have had if it traveled at a constant speed
Para las pistas, tratamos de mantener una velocidad constante, pero es casi imposible lograr una velocidad perfectamente constante
Con frecuencia encontramos la velocidad media, o la velocidad que el coche habría tenido si viajara a una velocidad constante
12
Multiple Choice
Which track was faster?
¿Qué pista era más rápida?
Track A
Track B
13
Open Ended
How can you tell using the speed equation?
14
Open Ended
How can you tell using the graph?
15
Multiple Choice
If your car is going 50 miles in 2 hours, what is its average speed?
Si su coche va a 50 millas en 2 horas, ¿cuál es su velocidad promedio?
50 mph
25 mph
100 mph
16
Multiple Choice
If a truck goes 30 miles in 30 minutes, what is the average speed?
Si un camión va 30 millas en 30 minutos, ¿cuál es la velocidad promedio?
60 mph
15 mph
45 mph
Investigation 1.1- speed tracks

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