Why Does Distance vs. Velocity Create a Parabolic Graph?

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SUMMARY

The discussion centers on the formation of a parabolic graph when plotting distance (y-axis) against velocity (x-axis) under constant acceleration conditions. The key equations referenced include s = ut + 1/2at² and v² - u² = 2as, which relate distance, initial velocity, acceleration, and time. A participant suggests that the relationship between distance and velocity can be understood through the shape of the graph, indicating a power function without the need for time as a variable. The provided data points illustrate the parabolic trend, reinforcing the conclusion that distance and velocity are related through quadratic functions.

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  • Understanding of kinematic equations, specifically s = ut + 1/2at² and v² - u² = 2as.
  • Familiarity with graphing techniques for quadratic functions.
  • Basic knowledge of constant acceleration concepts in physics.
  • Ability to interpret data sets and graph them accurately.
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  • Explore the derivation of kinematic equations in physics.
  • Learn how to graph quadratic functions and identify their properties.
  • Investigate the relationship between distance, velocity, and acceleration in motion analysis.
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Homework Statement


Why is a parabola formed when a graph of distance(y axis) vs. velocity(x axis) is plotted against each other? (constant acceleration)

Homework Equations


s=ut+1/2at^2 (guessing?)
v^2-u^2 = 2as (guessing?)

The Attempt at a Solution


I don't know if there is any relationship between veloctiy and distance without knowing the time. But my teacher told me that time was not needed to prove it was a power function...?
 
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Hi.

I'd say you're thinking about the problem in the wrong way.

Try drawing up the parabolic graph of distance vs velocity, and then ask yourself what the graph's shape is suggesting.

I hope that's a good enough hint in the right direction.

~ Ek.
 
Last edited:
I don't really understand...
my data is like below
distance(m)
1
1.3
1.5
1.69
vel(m/s)
1.1675
1.325
1.4275
1.51

How can I prove what kind of function is it??

The graph looks like this...
 

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