Graphing velocity, acceleration, and position

In summary, the conversation discusses graphing velocity vs. time and clarifying the meaning of "time" as the independent variable. The x-value is time in all three graphs, while the y-value represents acceleration, velocity, and position. The person has not been taught how to draw graphs and may need to study line graphs before tackling this exercise. Additional resources are provided for further understanding.
  • #1
banderson9
3
1
Homework Statement
I need help graphing velocity position and time on three different graphs when obstruction is present
Relevant Equations
P1. A driver is riding along at the steady speed of 25 m/s (90 km/h) when she notices an obstruction in the road
ahead. After a reaction time of 2 s, she applies the brakes to decelerate at the rate of 2.5 m/s2
im not sure where to start
 
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  • #2
Start by drawing the velocity vs. time first. I am not sure what you mean by graphing "time". That is normally the independent variable. Please clarify.
 
  • #3
im still not understanding. I understand that speed is d/t , but which time am i using; also i understand v=xf-x0/tf-t0 but what is my x value
 

Attachments

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  • #4
banderson9 said:
im still not understanding. I understand that speed is d/t , but which time am i using; also i understand v=xf-x0/tf-t0 but what is my x value
Look at the three figures showing coordinate axes in the pdf file you attached. The x-value is time in all three. The y value is acceleration, velocity and position. Have you been taught how to draw graphs?
 
  • #5
kuruman said:
Look at the three figures showing coordinate axes in the pdf file you attached. The x-value is time in all three. The y value is acceleration, velocity and position. Have you been taught how to draw graphs?
not yet we are given material before we are taught, to test knowledge so i am really confused
 

FAQ: Graphing velocity, acceleration, and position

What is the relationship between position, velocity, and acceleration graphs?

The position graph shows the location of an object over time. The velocity graph represents the rate of change of the position, i.e., how fast the position is changing. The acceleration graph shows the rate of change of velocity, i.e., how quickly the velocity is changing. In essence, velocity is the derivative of position, and acceleration is the derivative of velocity.

How do you interpret the slope of a position-time graph?

The slope of a position-time graph represents velocity. A steeper slope indicates a higher velocity. A positive slope means the object is moving forward, while a negative slope means it is moving backward. A horizontal line (slope of zero) indicates that the object is stationary.

What does the area under a velocity-time graph represent?

The area under a velocity-time graph represents the displacement of the object. If the graph is above the time axis, the area is positive, indicating forward movement. If the graph is below the time axis, the area is negative, indicating backward movement. The total area gives the net displacement over the time interval.

How can you determine acceleration from a velocity-time graph?

Acceleration is determined by the slope of the velocity-time graph. A positive slope indicates positive acceleration (speeding up), while a negative slope indicates negative acceleration (slowing down). A horizontal line (slope of zero) indicates constant velocity, meaning no acceleration.

What does a curved line on a position-time graph indicate?

A curved line on a position-time graph indicates that the object is accelerating. If the curve is concave up (like a U), the object is speeding up. If the curve is concave down (like an inverted U), the object is slowing down. The curvature represents a changing velocity, which means there is acceleration.

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