leb report 7 execution

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question 8

Post  a on Tue Nov 18, 2008 10:12 pm

I'm using DeltaPE_max = sqrt((Deltak/k)^2+(2*Deltax/x)^2)*PE_max, but it's not working..am I doing something wrong?

a
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reply

Post  guest23 on Tue Nov 18, 2008 10:30 pm

the eqn above is right except its x_0

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graph

Post  meeeeeee on Wed Nov 19, 2008 1:15 pm

quick question... for the graph, which goes on the x axis and which goes on the y axis?

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Re: leb report 7 execution

Post  Guest01 on Wed Nov 19, 2008 5:59 pm

X is Tmeas and Y is Ttheor

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Re: leb report 7 execution

Post  hey on Wed Nov 19, 2008 8:21 pm

for the graph

do u need to draw 3 lines
and do we need the error?

hey
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Question 3

Post  lost one on Thu Nov 20, 2008 11:16 am

I'm having problems calculating the T_Theor. I know the formula is 2*pi*sqrt(m/k). i know the mass is suppose to be the glider and attached mass. but everytime i try it i get it wrong. can someone offer ideas on what i might be doing wrong...

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graph

Post  troubled on Thu Nov 20, 2008 1:22 pm

for the graph what goes on the x axis?

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Re: leb report 7 execution

Post  Guest01 on Thu Nov 20, 2008 5:55 pm

For the graph you should have a solid "best fit" line and then dashed lines showing the error. As for the error bar you only need to draw them for the Ttheor I believe, which ever the manual says.

Try calculating the sqrt(m/k) first then multiply it by (2pi).

As for axis labels try looking through previous posts (Hint: It's a few before this one)

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Re: leb report 7 execution

Post  r u sure on Thu Nov 20, 2008 6:13 pm

are u sure about this??

X is Tmeas and Y is Ttheor

cause i get the slope wrong this way

when ireverse it i get t right ??

r u sure
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ques 7

Post  confuzed on Thu Nov 20, 2008 7:15 pm

i keep getting #7 wrong for some reason, around what time values did you guys get for the first velocity? i think i may have wrote mine down wrong..or around what value worked in maple ta for you?

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Question 8

Post  johnson on Thu Nov 20, 2008 7:20 pm

sqrt((Deltak/k)^2+(2*Deltax/x)^2)*PE_max
needs to be
sqrt((Deltak/k)^2+(2*Deltax_0/x_0)^2)*PE_max
if you're just copying and pasting.

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Re: leb report 7 execution

Post  Guest01 on Thu Nov 20, 2008 8:35 pm

I'm positive on those labels.

You should have a positive linear line as your graph.

My MapleTA has been finished and submitted and nothing was incorrect on it.

Here is my graph:

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Re: leb report 7 execution

Post  gujugodd on Fri Nov 21, 2008 1:00 am

for the slope, is it through the origin?

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Re: leb report 7 execution

Post  guest2 on Fri Nov 21, 2008 1:13 am

anyone knows where we get x_0??

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Re: leb report 7 execution

Post  Guest01 on Fri Nov 21, 2008 2:30 am

I don't believe the slope goes through the origin.

x0 is the displacement of the glider on the airtrack, I think it was either the ~10cm or the ~30cm. For which ever one you're figuring out

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