Date: Fri, 18 Nov 2011 14:02:54

Author: --- Bill Norwood

Subject: Re: Simple Ways to Measure g

Post:

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Many thanks, Dan, for your early reply and helpful ideas.
-Students are supposed to collaborate with each other and design their own =
experiments, and report on their results, and there is more, but I don't si=
t in on the TA sessions.
-In this lab they are supposed to measure gravity to within 1%, but I do no=
t think this will be possible for them, so I guess they will be relegated t=
o discussing what is limiting their precision.
Best, Bill Norwood
U of MD at College Park

From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On Beh=
alf Of Dan Beeker
Sent: Friday, November 18, 2011 1:53 PM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Simple Ways to Measure g

use motion detector, plot velocities of cart on a ramp, both up and down. =
Take slopes and average them to eliminate friction.

do the same with an air track - eliminates angular momentum.

atwood machine - can be straight forward or complicated

drop a meteerstick through your fingers. Measure distance dropped and work =
backwards to fing g

centripetal force - string through tube with mass at both ends. Twirl one e=
nd. Accel cent =3D mg

ball rolling down inclined plane, include ang mom.

Is the goal to measure as precisely as possible? To meet some arbitrary acc=
uracy? To see who has original ideas? To see who can estimate experimental=
accuracy most reliably, none of the above? all the above?

Dan

On 11/18/11 1:02 PM, Edward Sabol wrote:
Atwood's machine
________________________________
From: bnorwood@umd.edu
To: tap-l@lists.ncsu.edu
Date: Fri, 18 Nov 2011 12:54:47 -0500
Subject: [tap-l] Simple Ways to Measure g

Hi Taplers,

TA meeting within 2 hours, and I need to come up with more simple suggestio=
ns, for measuring g.

This is a make your own, and discuss it ,and report on it, type lab for pre=
-meds etc.

Possible Expts:

1. Pendulum

2. Ball/mass drop: One student drops the mass, and 2 or 3 others, independ=
ently of each other, operate timers, then average their results.

3. Toy cars coasting down inclined plane.

4.

5.



--

Dan Beeker

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=
Many thank=
s, Dan, for your early reply and helpful ideas.-Students are supposed to collaborate with each other and design their=
own experiments, and report on their results, and there is more, but I don=
ít sit in on the TA sessions.-In thi=
s lab they are supposed to measure gravity to within 1%, but I do not think=
this will be possible for them, so I guess they will be relegated to discu=
ssing what is limiting their precision.Bes=
t, Bill NorwoodU of MD at College Park From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] <=
b>On Behalf Of Dan BeekerSent: Friday, November 18, 2011 1:5=
3 PMTo: tap-l@lists.ncsu.eduSubject: Re: [tap-l] Simp=
le Ways to Measure g=
=
use motion detector, plot velocities of cart on a ramp, both up and d=
own. Take slopes and average them to eliminate friction.do the same=
with an air track - eliminates angular momentum.atwood machine - c=
an be straight forward or complicateddrop a meteerstick through you=
r fingers. Measure distance dropped and work backwards to fing gcen=
tripetal force - string through tube with mass at both ends. Twirl one end.=
Accel cent =3D mgball rolling down inclined plane, include ang mom=
.Is the goal to measure as precisely as possible? To meet some arbi=
trary accuracy? To see who has original ideas? To see who can estimat=
e experimental accuracy most reliably, none of the above? all the above?DanOn 11/18/11 1:02 PM, Edward Sabol wrote: =
Atwood's machi=
ne<=
/div>From: bnorwood@umd.eduTo: tap-l@lists.ncsu.eduDate: Fri, 18 Nov 2011 12:54:4=
7 -0500Subject: [tap-l] Simple Ways to Measure gHi Taplers,TA mee=
ting within 2 hours, and I need to come up with more simple suggestions, fo=
r measuring g.This is a make your own, and discuss it ,and report on it=
, type lab for pre-meds etc.<=
span style=3D'font-size:14.0pt'>Possible Expts:1. Pendulum<=
/o:p>2. Ball/m=
ass drop: One student drops the mass, and 2 or 3 others, independentl=
y of each other, operate timers, then average their results.3. Toy cars=
coasting down inclined plane.4. 5. -- Dan Beeker=

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