# leb report 7 execution

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## leb report 7 execution

Does anyone know what the equation for DeltaKE_max is?

hbhbc
Guest

## Re: leb report 7 execution

DeltaKE_max=(2*Deltaw/w)*KE_max

Delila
Guest

## Re: leb report 7 execution

Does anyone know Delta T

Guest24
Guest

And Delta PE?

Guest24
Guest

## Question #2

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

Mustakra
Guest

## Re: leb report 7 execution

what is #7 and #8

Sarah
Guest

## Questions 1-11

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?

ravenscorne

Posts : 15
Join date : 2008-09-20

## Re: leb report 7 execution

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

Greatful
Guest

## units

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

jsyz
Guest

## Re: leb report 7 execution

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

its me
Guest

## Re: leb report 7 execution

for number 4
my slope was .170

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

ques
Guest

## Re: leb report 7 execution

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

its me
Guest

## pe and ke max

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

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

anna
Guest

## Re: leb report 7 execution

hey

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

Mike
Guest

## ques10

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

guest23
Guest

## question 8

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
Guest

the eqn above is right except its x_0

guest23
Guest

## graph

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

meeeeeee
Guest

## Re: leb report 7 execution

X is Tmeas and Y is Ttheor

Guest01

Posts : 133
Join date : 2008-09-19

## Re: leb report 7 execution

for the graph

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

hey
Guest

## Question 3

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...

lost one
Guest

## graph

for the graph what goes on the x axis?

troubled
Guest

## Re: leb report 7 execution

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)

Guest01

Posts : 133
Join date : 2008-09-19

## Re: leb report 7 execution

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
Guest

## ques 7

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?

confuzed
Guest