leb report 7 execution

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leb report 7 execution

Post  hbhbc on Mon Nov 17, 2008 11:57 pm

Does anyone know what the equation for DeltaKE_max is?

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Re: leb report 7 execution

Post  Delila on Tue Nov 18, 2008 12:01 am

DeltaKE_max=(2*Deltaw/w)*KE_max

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Re: leb report 7 execution

Post  Guest24 on Tue Nov 18, 2008 12:16 am

Does anyone know Delta T

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Re: leb report 7 execution

Post  Guest24 on Tue Nov 18, 2008 12:26 am

And Delta PE?

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Question #2

Post  Mustakra on Tue Nov 18, 2008 12:30 am

DeltaT = .5*(Deltak/k)*T

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Re: leb report 7 execution

Post  Sarah on Tue Nov 18, 2008 3:54 pm

what is #7 and #8

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Questions 1-11

Post  ravenscorne on Tue Nov 18, 2008 5:24 pm

Question 1: Table (Use F = m*g, and k = F/x)

Question 2: DeltaT = .5*(Deltak/k)*T

Question 3: Table (T_theor = 2*pi*sqrt(m/k), and DeltaT_theor = .5(Deltak/k)*T_theor)

Question 4: Graph, find slope

Question 5: Use equation: (Your slope - 1)/(Error of slope)

Question 6: Table

Question 7: v_0 = w/t
Deltav/v = Deltaw/w

Question 8: DeltaPE_max = sqrt((Deltak/k)^2+(2*Deltax/x)^2)*PE_max

Question 9: DeltaKE_max = 2*(Deltaw/w)*KE_max

Question 10: Table

Question 11: Use equation: (PE_max - KE_max)/(sqrt(DeltaPE_max)^2 + DeltaKE_max)^2))

And you're done! Now wasn't that easy? Very Happy

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Re: leb report 7 execution

Post  Greatful on Tue Nov 18, 2008 6:48 pm

Your great!!!!!!! Very very nice of you!

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units

Post  jsyz on Tue Nov 18, 2008 7:19 pm

units
m=kg
x=m
f=N
k=N/m
M=kg
t=s
width=m
v=m/s
PE+KE=J
for the slope since it's s/s, i guess it should be none~
hope this helps

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Re: leb report 7 execution

Post  its me on Tue Nov 18, 2008 7:28 pm

hey guys
what r the units of # 1,3,4 and 10
thannxxxx aloooooooot

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Re: leb report 7 execution

Post  ques on Tue Nov 18, 2008 7:40 pm

for number 4
my slope was .170

so which error sounds more right, .01 or .001?

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Re: leb report 7 execution

Post  its me on Tue Nov 18, 2008 7:49 pm

thanx jsyz, i didn't see ur post
thanx a lot

last question plz
how do u find PEmax and KEmax
plz post the equation Sad

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pe and ke max

Post  anna on Tue Nov 18, 2008 8:58 pm

PE max= .5(k)(x_0)^2

KE max= .5(M)(v_0)^2

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Re: leb report 7 execution

Post  Mike on Tue Nov 18, 2008 9:35 pm

hey

do we need to make graphs? cause there are no graph papers, and my TA didn't mention anything about graphs !!

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ques10

Post  guest23 on Tue Nov 18, 2008 10:46 pm

for ques 10, when calc Pe_max what do we use for x_0 (initial/equilibrium position)?

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question 8

Post  a on Tue Nov 18, 2008 11:12 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?

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reply

Post  guest23 on Tue Nov 18, 2008 11:30 pm

the eqn above is right except its x_0

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graph

Post  meeeeeee on Wed Nov 19, 2008 2:15 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 6:59 pm

X is Tmeas and Y is Ttheor

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Re: leb report 7 execution

Post  hey on Wed Nov 19, 2008 9:21 pm

for the graph

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

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Question 3

Post  lost one on Thu Nov 20, 2008 12:16 pm

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 2:22 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 6:55 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 7:13 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 ??

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ques 7

Post  confuzed on Thu Nov 20, 2008 8:15 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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