Centroid Question: Understanding & Measuring Distance

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In summary, the conversation is discussing a question about finding the position of the centroid of a shape and determining the range of values for which the centroid lies within the shape. The question does not assume the centroid to be at the origin, and finding the centroid for some values of L may not help with the first part of the question.
  • #1
Ry122
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I'm having trouble understanding what this question is actually asking for. Is it assuming the centroid to be the origin and asking how far the bottom of the shape extends downwards for the origin to be the centroid?
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  • #2
Ry122 said:
I'm having trouble understanding what this question is actually asking for. Is it assuming the centroid to be the origin and asking how far the bottom of the shape extends downwards for the origin to be the centroid?
No, I don't think so. To the best of my interpretation of the question, it contains two parts:
(1) Given this shape, find out the position of the centre of mass (in terms of L).
(2) From that answer, determine the range of values of L such that the centre of mass lies in the shape itself (i.e. [itex]L \leq y_{c} \leq 0[/itex])
 
  • #3
Ry122 said:
I'm having trouble understanding what this question is actually asking for. Is it assuming the centroid to be the origin and asking how far the bottom of the shape extends downwards for the origin to be the centroid?
Not exactly that, but if you were to answer that question it would be a short step to answering the last part of the given question. Wouldn't help so much with the first part though, so address that first.
 
  • #4
The figure is described completely and you are asked to find the centroid. So, no, the problem does not assume the centroid is at the origin! The centroid of a region always lies within it convex hull but for some values of L, the centroid might lie just above the origin, outside the figure itself.
 

Related to Centroid Question: Understanding & Measuring Distance

1. What is a centroid and why is it important?

A centroid is the geometric center of a shape or object, often represented by a single point. It is important because it helps to understand the distribution and balance of a shape, and is a fundamental concept in mathematics and geometry.

2. How is the centroid of a shape calculated?

The centroid of a shape can be calculated by finding the average of all the points in the shape. For 2-dimensional shapes, this is done by finding the average of the x and y coordinates. For 3-dimensional shapes, the average of the x, y, and z coordinates is taken to find the centroid.

3. What is the difference between a centroid and a center of mass?

A centroid is a purely geometric concept, while the center of mass takes into account the weight and distribution of mass within a shape. In simpler terms, the centroid is based on the shape's dimensions, while the center of mass is based on its actual physical properties.

4. How is distance measured from a centroid?

Distance is measured from a centroid by finding the shortest distance between the centroid point and any other point on the shape. This can be done using the Pythagorean theorem or other distance formulas.

5. What are some real-world applications of centroid and distance measurements?

Centroid and distance measurements have a variety of real-world applications, including in engineering, architecture, and physics. They can be used to analyze and design structures, determine the center of gravity in objects, and calculate the balance of weight in vehicles and aircrafts.

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