# Which of the graphs correctly shows the relation between the original position x of e

1. Jan 13, 2012

### trivk96

1. The problem statement, all variables and given/known data

A wave is sent along a long spring by moving the left end rapidly to the right and keeping it there. The ﬁgure shows the wave pulse at QR - part RS of the long spring is as yet undisturbed.Which of the graphs correctly shows the relation between the original position x of each point of the spring and the corresponding displacement ∆x of that point (Displacements to the right are positive.)

2. Relevant equations
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3. The attempt at a solution

I think that it is #3 because the displacement at the begining is 0 correct? Also, the wave part is moving right which means it was displaceed at a positive. Also the end has not been disturbed yet so its diplacement is 0. Is all this correct. if it isn't, could you help me understand it?

If the above was confusing to understand i apologize.

Thanks in advance for the help!!!!!!!

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Last edited: Jan 13, 2012
2. Jan 14, 2012

### SammyS

Staff Emeritus
Re: Which of the graphs correctly shows the relation between the original position x

#3 cannot be the correct answer. The left end of the spring starts out at x=0 and ends up at x=a, where a is some positive value.

What is Δx at the right end ?

3. Jan 14, 2012

### trivk96

Re: Which of the graphs correctly shows the relation between the original position x

So it would be 1 right??

4. Jan 14, 2012

### SammyS

Staff Emeritus
Re: Which of the graphs correctly shows the relation between the original position x

That looks to me like the best choice.

Can you defend that choice?

5. Nov 15, 2012

### A0170514

Re: Which of the graphs correctly shows the relation between the original position x

6. Nov 15, 2012

### SammyS

Staff Emeritus
Re: Which of the graphs correctly shows the relation between the original position x

Do you realize that you've answered a 10 month old post ?

7. Nov 15, 2012

### A0170514

Re: Which of the graphs correctly shows the relation between the original position x

yeah.. taking physics for the first time in college