pendulum lab mark sheet - studyphysics.ca

Block: 7/8 Date: 4/29 Prepared By: Megan Felts , Elashia Young

Comments Mark (?/3)

ObjectiveState what you are trying to do or discover.

Great. 3

HypothesisAt this point, make an educated guess as to what you think the outcome will be.

You didn't give the units for 9.81, nor for the variables. 2

EquipmentList the equipment you will be using. You do not have to list things like your pencil and ruler. Sometimes a diagram will be enough.

Groovy 3

ProcedureOutline the main points of what you will be doing. Use point form and be brief.

#3: By going beyond 15o you will have less accurate results. 2

Pre-Lab QuestionsSometimes there may be some questions you are supposed to answer before starting the lab. Answer those questions here.

Not applicable N/A

ObservationsQuantitative measurements must be organized in a table. Qualitative measurements can be written in point form. Do not make rough copies or erase mistakes. Instead, cross them out neatly.

One very small change, that applies to both observations and analysis. You should have the units of measurement given at the top of each column (in the heading) instead of throughout the entire table. It was great to see that you tried a variety of lengths and number of swings. The only drawback I would point out is that timing a single swing can be difficult. I would suggest at least 3 swings to get accurate results.

2

AnalysisExplain what your observations mean. Answer any questions in full sentences. Show any calculations that you use (this is where you do your “number crunching”).

In general your analysis was fine. There were a couple of trials (4 and 13) that I got different values for... must have been calculation errors. This means that your final average is a little off. I would also point out that since your length only has 2 sig digs, maybe your final values for g should only have 2 sig digs... not a big deal though, since you probably could have easily shown 3 sig digs for the lengths.

2

Sources of ErrorList them clearly and be specific. Calculate percentage error or difference if applicable.

These are good ideas for sources of error, but they could be given with a bit more detail, and should also be typed into the main lab report (it's fine for the calculation to be on your sheet).

2

Concluding StatementTie everything up here... discuss your objective, observations and analysis in order to come to some conclusion. Use full sentences, but be brief.

A question... does a scientist truly believe they will get exactly the same answer in the analysis as in the hypothesis? Nope. The real question is, how far off are they from each other? In your case, your hypothesis and analysis are very close to each other, so much so that you can explain it as experimental error and call the lab a success.

2

QuestionsAnswer any questions that were assigned for after the lab.Two marks each.

Good answers. In #2 just replace “revolutions” with “swings.” 4

Overview & SummaryThis was a much better lab.

Final Mark22/28

Pendulum Lab Mark Sheet

Block: 7/8 Date: 5/2 Prepared By: Jeremy Godbout Alexa Davidson Brenden Ulrich

Comments Mark (?/3)


Groovy 3


Great 3


Metre stick? 2


You are suggesting an angle beyond 15 degrees, which will cause errors because of the formula's limitations.

2


Not applicable N/A


Your second qualitative observation is not really and observation; it is more a statement of how you propose to do the analysis.

2


Groovy 3


Fantastic 3


Talk like Yoda do you in sentence conclusion you say... “If I was to do something next time on the lab would be to make an actual pendulum and time it using that.” And here I was thinking that the thing you were using in your lab was an actual pendulum. Tell me, what was it really? A hamster?

2


In #1 it would be good to mention he was limited to using his pulse as a timer. 3

Overview & SummaryA solid lab! Good work.

Final Mark23/28


Block: 5/6 Date: 5/2 Prepared By: Kris Wagner, Stephane Savaria, Drew Dare

Comments Mark (?/3)


You should drop the second sentence, especially since you incorrectly say you'll be measuring gravitational force; you are measuring acceleration.

2


Reread your first sentence. 9.81 is not “universal” since in physics that means “same everywhere in the universe”, and it is not the “force” of gravity, it is the acceleration. You should not show manipulated formulas.

2


A “peace” of thread measured as 46 cm will make a shorter pendulum once it is tied off to the stopper. What is so special about this length?

2


These must be numbered steps. In step 2 you mention measuring the time it takes for “5 periods.” Period is a measurement of time itself to do one swing; you meant to say “5 swings.” You procedure needs to be more carefully written and detailed.

1


Not applicable N/A


It would be nice if you had drawn in some lines to make it a proper table, and clearly stated the “length” used, instead of just writing it as “46cm rope” to the side.

2


Your calculations look ok except for one (#13). The only big problem is that you do not give an average of your values anywhere. You must give your final value as an average of all your trials... that's the whole point of doing a bunch of trials.

2


You did not calculate your percent error. 1


Again, it is not a force. This conclusion is far too short and makes only vague references to your results.

1


#1 :You should mention that Galileo would have been depending on his pulse to time things.

3

Overview & SummaryThere is still a lot of room for improvement here.

Final Mark16/28


Block: 7/8 Date: 5/5 Prepared By: Matthew & Eddie (full names next time, please!)

Comments Mark (?/3)


Groovy 3


You do not need to list “independent and dependent” variables, although it is ok that you did. There is one note I would mention... although you are calculating “g”, it is technically a controlled variable. You did not allow “g” to change while performing the lab.

3


Good. 3


Only one serious flaw here that would really affect your experiment. In step 3 you say you should raise the pendulum to a 15O angle “relative to the ground.” This would be measured from the horizontal, while you are actually supposed to measure the angle from the vertical (the equilibrium position).

2


Not applicable N/A


Good stuff 3


There is one thing that is missing that takes away from an otherwise great Analysis spreadsheet. At the very bottom you have a final value (which from the formula is obviously the average) that is unlabeled.

2


Good stuff. 3


Solid work. 3


Umm, why do think Glileo used blocks of stone to measure lengths??? 3

Overview & SummaryGreat job guys!!!

Final Mark25/28


Block: Blocks Next Time

Date: 5/5 Prepared By: Mike Rouhiainen, Vincenzo Marozzi,Tyler Tapanainen,Andre Prud’homme

Comments Mark (?/3)


Remember, you should not to tell me how you will do the lab at this stage. 2


Good. 3


Yup. 3


#4: You tell me to measure “15° from the ground,” when you really must say “from the vertical/equilibrium posiition.”

2


Not applicable N/A


Small problem; by showing the period here, you have already, technically, started number crunching. This belongs in Analysis.

2


Seems like an awkward way to set up your “g” formula, but it is mathematically sound.

3


At the end of your analysis, you have a value of 9.95, but then you use 10.484 in your % error (which has a slightly wrong formula).

2


Good stuff. 3


#2: Actually, the string would have to be shorter. 3

Overview & SummaryGood lab. One small detail to point out is that a pendulum goes through swings, not revolutions.

Final Mark23/28


Block: Date: 5/5 Prepared By: Perry Brad Trevor

Comments Mark (?/3)


Ok. 3


Look at the wording in your hypothesis... it is an accepted value. 2


Good. 3


Fine. 3


Not applicable N/A


Because you did not make your column headings part of your actual table, they do not line up properly and make it very difficult to interpret which column is which. You did not include trial numbers. Your measurement of length is not in standard units.

1


If you choose to do the calculations on a spreadsheet, you must include the spreadsheet for marking. You do not show sample calculations. Your headings do not line up with the columns. You do not show a final average value for g.

1


As long as you do not go beyond 15 degrees, the angle doesn't matter. Where is your calculation of percent error???

1


Your results do agree with your hypothesis, within certain margin of error. A scientist never expects results to exactly agree with hypothesis. If you measured a swaying object, you would still eventually be measuring g; did you mean use a swaying object instead of a pendulum?

1


#1 It's “measuring”, not “calculating”, the time. 4

Overview & SummaryWhat happened in the second half of the lab???

-1 for no names, blocks, or date at top of document (no, having all your names in the file name does not count).

Final Mark18/28


Block: 5/6 Date: 5/6 Prepared By: Phong Le, Carwyn Lloyd, Craig Pewar

Comments Mark (?/3)


Good stuff. 3


Yup. 3


Groovy. 3


Don't you need to tie the thread first, then measure it? Watch out how you word things (for example, step 6). Step 7 is unnecessary.

2


N/A


Good, but in the future make sure your units at the top of your table are lower case, not capitalized.

3


Good stuff. Well laid out spreadsheet. 3


Your second and third sources are essentially the same. 2


Don't say your results “do not agree with hypothesis.” It is rare that a scientist gets exactly the same result as the hypothesis. Your value was very close to your hypothesis. Within experimental error they are in agreement.

2


Great. 4

Overview & SummaryI like this lab overall. Good job!

Final Mark25/28


Block: 7/8 Date: 5/6 Prepared By: Colleen Lee, Cory Skerlak, Don-Bosco Nguyen, Maira Daurte

Comments Mark (?/3)


Good. 3


In your formula, g is not 9.81 m/s2; that is your hypothetical value. In the formula g is acceleration due to gravity measured in m/s2.

2


Good. 3


Groovy 3


N/A


“Trial” must be the first column of the table. I find it hard to believe that you made your pendulum less than 2cm long for the last two trials, especially based on the times you recorded. Are you sure it wasn't 20cm?

2


Again, the two last trials pop up. The results for these two are so far off from the rest that you should have sirens going off in your head.

2


Good. 3


Don't come down so hard on yourself for your results not perfectly matching your hypothesis. In a real lab it will never exactly match... but did it match within a certain degree of error.

2


Galileo would have been able to handle this math without much of a problem. 3

Overview & SummaryAn all around solid lab. Good work!

Final Mark23/28


Block: 5/6 Date: 5/9 Prepared By: Brittny H James A Nathaniel

Comments Mark (?/3)


Groovy 3


You need to say what your variables are, and the units they are measured in. 2


Ok 3


You must show your procedure as a numbered list. Omit the last three steps in your procedure... they have nothing to do with performing the lab.

2


Not applicable N/A


Great looking table, but you should be showing the info a bit differently. There should be a column of its own for number of swings, and length of string. You should also omit the last column, since technically you've started calculations (which is part of the analysis).

1


Groovy. Only problem is that percent error belongs in the next section, and you should not be calculating absolute error at all.

3


#1 is far too vague.#2 & #4 are identical.This is where your percent error is supposed to be.

1


What do you mean “one thing you would have done differently is using the stopwatch?”

2


??? 0

Overview & SummaryWatch out. You need to make sure you are following all the guidelines of the lab format, as well as completing everything for the individual lab.

-2 for lateness

Final Mark15/28


Block: 5/6 Date: 5/8 Prepared By: Justin D, Chris M, Ryan, Cameron, Brandon

Overview & SummaryRemember, file name needs to be the name of one of the group members, not “pendulum lab.doc”. Otherwise, great lab.

Final Mark25/28


Comments Mark (?/3)


Groovy 3


Yup 3


Metre stick? 2


#2 Where should I be measuring?#4 I can't measure one period. That's like asking me to time how long 60 seconds is. You can measure the period of one swing.

2


Not applicable N/A


You should not be showing your period here. That is a calculation, which means it belongs in analysis.

2


Good work. The only small problem that creeps in is that it looks like you used a rounded off period in your calculations. I use all the original numbers and got a slightly different result.

3


If the angle wasn't consistent, you're still ok. As long as it is not beyond 15 degrees (as you pointed out).

3


Groovy. 3


Yup. 4

Block: 5/6 Date: 5/13 Prepared By: Lateasha G. Sean N. Ashley P, Sinna G., Sherri T., Peter

Comments Mark (?/3)


Good. 3


You need to say what each of the variables in your formula is equal to. 2


Must be a list. 2


These really should be numbered steps. In (b) you do not say where to measure the stopper to (the middle). You should say something about measuring for a certain number of swings.

2


Not applicable N/A


No title on this section. Period and especially gravity must be in the next section, analysis.

1


You need to show a minimum of one sample calculation. 2


Usually this would also be presented as a list. If you choose to do it in paragraphs, each idea needs to be separate and carefully explained in detail. Show the calculations for percent error.

1


This is about a third of the way done. Look at the handout on lab write ups for ideas of what you are missing.

1


Numbered? #1 Galileo would have had a lot more trouble than getting it to decimal places... he would have had trouble getting any sort of meaningful measurement of time.

3

Overview & SummaryAt the start it was little details causing problems, but by the end you were stumbling over major errors in lab formating and necessary content.

Final Mark17/28


Block: 5/6 Date: 5/13 Prepared By: Devin U, Brad P, Justin R, Laski C

Comments Mark (?/3)


You should not tell me how (“using pendulums”). 3


Groovy. 3


Yup. 3


#4: “15 degrees from the ground”... did you mean from the “vertical or equilibrium position”?

2


Not applicable N/A


Period really belongs in analysis, since you are calculating it. 2


Two problems: 1) Your period is not being calculated by the spreadsheet... I assume

you calculated them separately and then typed them in.2) Why do you use “sum” at the start of all your gravity calculations?

2


% error does not have “absolute error – accepted” on the top in its formula. 2


Maybe your hypothesis and analysis don't exactly agree, but that's ok. 3


Yup 4

Overview & SummaryA solid lab. Good work.

Final Mark24/28


Block: 5/6 Date: 5/13 Prepared By: Meaghan, Brett

Comments Mark (?/3)


Yup. 3


Some of your formula is missing! 2


Metre stick. 2


If I measure and then tie it, I won't have the correct length. Shouldn't I be measuring multiple swings, not just one?

1


Not applicable N/A


Period belongs in Analysis; it's a calculation. 2


I really start to question your averaging techniques. Besides the fact that I think measuring for only one swing seriously compromises your data, when I use your own original numbers I get a final average of 9.78, quite a bit different from yours. I think you were rounding off too much.

1


Ok. 3


You need to talk about your objective, how your hypothesis and your analysis compare, etc....

1


#1 The ancient Greeks came up with pi over 2000 years ago. 3

Overview & SummaryNext time please send in a rough draft first so we can look over it.

Final Mark18/28


Block: 7/8 Date: 5/8 Prepared By: Hernandez, Nunes

Comments Mark (?/3)






The questions were supposed to go at the end of the lab. N/A






Overview & SummaryThis lab is only a partial improvement over the last lab. You didn't give the lab a title or include your names on the lab. You need to come in to the tutorials to look at how to make major improvements to your labs.

Final Mark11/28


Block: 7/8 Date: 5/9 Prepared By: Raelene Agnes Sarah

Comments Mark (?/3)


Good. 3


Why don't you believe the value from the data sheet is the best possible guess? Also, try to actually type out the formula in a more “formal” format.

2


Good. 3


You should be a little more complete with your description of what needs to be done. How long should it be, how many swings should be done, how many trials should be done, etc.

2


Not applicable N/A


Ok 3


Good job. 3


You forgot to calculate the percent error. 1


Your findings are not conclusive; it may be better to say that they agree within experimental error. Why do you say that there is no lab that you think can relate to this one? In the statement just before you suggest a different lab that is related.

2


#2 How would you expect your observations to be different though? 2

Overview & SummarySpend a bit of time making sure that you complete all the little bits of each section.

+1 for PPT

Final Mark22/28


Block: 7/8 Date: 5/9 Prepared By: John, Desmond, Lewis

Comments Mark (?/3)


Great. 3


Good. 3


Yup, looks good. 3


The procedure is not nearly detailed enough... it is too vague to be able reproduce the lab.

1


Not applicable N/A


How long is your string? If you don't include this in your observations, how can I verify your results.

2


It is very difficult to understand what you're talking about at the beginning of the analysis. And how is it possible that you (accurately) measured the period of one swing. Also, you at times refer to what I think you mean is a “swing” as a period.

1


You should list more sources (and show them as individual items on a list), and it is very difficult to understand what you are trying to do in your calculation of your percent error.

1


Your conclusion is a bit vague. 1


Your answer for #2 doesn't say anything about how your observations would be different.

2

Overview & SummaryYou still need to do a lot of final editing on this lab to make it really finished.

+1 for PPT

Final Mark18/28


Block: 5/6 Date: 5/9 Prepared By: Yonathan Patrick Marko

Comments Mark (?/3)


Your first section has been misnamed as “Observation”, which is really much later on.

2


You linked to some image off the internet (I assume an image of the formula) that doesn't show up, and you don't explain the formula. You also don't predict a value.

0


Yup, looks good. 3


Your procedure just does not make sense. Re-read it to yourself and hopefully you'll see that statements like “this helped us finger the exact length” simply don't have any meaning.

1


Not applicable N/A


You should give the length here, and also give raw data for the time measured. The period should be a separate column on its own.

1


At the start you said that the length is 0.70 m, but then it looks like you used 1.70m in the calculations. You also linked to a web based image again. I get very different answers and it all depends on which value for length is the correct one. Using either of the values gravity comes out very wrong.

0


If you think your answer is really 9.89, does it really seem reasonable that you have over a 90% error? You should also try to give more sources of error.

1


This is far from complete. 0


Where are your answers to the questions? 0

Overview & SummarySorry to say this is a very incomplete lab that has many fundamental errors.

+1 for PPT

Final Mark9/28


Block: 5/6 Date: 5/8 Prepared By: Michael Steven

Comments Mark (?/3)


Great. 3


You need to say what each of the variables in the formula means. 2


Yup, looks good. 3


You never mention anything about when to measure the length of string. Before you cut it... after you cut it... ? It is also unnecessary to give “reminders” at the end of the procedure.

2


Not applicable N/A


Give me the time for multiple swings. If you want to show the period of one swing, show it in its own separate column.

2


Great. 3


Good job here. 3


You might want to think twice about giving an answer with so many sig digs... it's not very reasonable. When you say you would vary measurements next time, do you mean the length?

2


Good. 4

Overview & SummaryGood job. I would suggest that next time you don't use an rtf file since they will appear differently on different computers. For example, all your tabs for your charts made them look very jumbled.

Final Mark24/28


Block: 7/8 Date: 5/11 Prepared By: Kenny Kiefer

Comments Mark (?/3)


Great. 3


The only small change I would suggest for next time is that you say what each variable is measure in (e.g. Period (s))

3


Yup, looks good. 3


Good stuff. 3


Not applicable N/A


Wow! You did a bunch of trials! This is truly one of the largest collections I've ever seen a group do on this lab.

3


You incorrectly say that you are measuring the force due to gravity, when it's really the acceleration. Also, probably just due to rounding off on the enormous amount of calculations you did, but I got an average of 9.96 m/s2 for gravity. Did you use a spreadsheet to calculate this?

2


Great stuff! 3


Could you maybe add something about how to improve this lab, or a related lab?

2


Good, if a little long ;) 4

Overview & SummaryTop notch lab! You should be really proud of the work you did here. Not only was the lab very well performed, but you also presented your lab in a very polished format.

+1 for PPT

Final Mark27/28


Block: 1/2 Date: 5/11 Prepared By: Daniela Gail

Comments Mark (?/3)


Great. 3


Yup. 3


Yup, looks good. 3


Good! 3


Not applicable N/A


Great! 3


Great stuff. 3


Good stuff again! 3


Very well written conclusion! 3


Groovy. 4

Overview & SummaryVery well written lab that could serve as an example to other students.

Final Mark28/28


Block: 1/2 Date: 5/10 Prepared By: Travis Sayri Kyle

Comments Mark (?/3)


Great. 3


You say “9.81m/s because that it the average force of gravity on earth.” It's actually 9.81 m/s2 and it's an acceleration due to gravity, not a force.

2


Yup. 3


Good. 3


Not applicable N/A


Your observations can only include what you actually saw while performing the lab, not things you calculated later like gravity (which is again mislabeled as m/s).

2


“On back sheet of paper”... what paper? 0


You should give your sources of error as a list, not a paragraph. Also, where is your calculation of the percent error?

1


Ok. Why don't you say what your final value for gravity came out as? 2


Good job. 4

Overview & SummaryStarts out as a great lab, but where is your analysis?

Final Mark20/28


Block: 5/6 Date: 5/11 Prepared By: Kayla, Kaylynn, Maggali

Comments Mark (?/3)


Great. 3


Groovy 3


Yup. 3


Good. 3


Not applicable N/A


Yuppers 3


Good stuff. 3


Where is your calculation of the percent error? 1


Groovy groovy 3


Good job. 4

Overview & SummaryGreat job!

+1 for PPT

Final Mark27/28


Block: 1/2 Date: 5/10 Prepared By:

Comments Mark (?/3)


Great. 3


You say “9.81m/s because that it the average force of gravity on earth.” It's actually 9.81 m/s2 and it's an acceleration due to gravity, not a force.

2


Yup. 3


Good. 3


Not applicable N/A


Your observations can only include what you actually saw while performing the lab, not things you calculated later like gravity (which is again mislabeled as m/s).

2


“On back sheet of paper”... what paper? 0


You should give your sources of error as a list, not a paragraph. Also, where is your calculation of the percent error?

1


Ok. Why don't you say what your final value for gravity came out as? 2


Good job. 4

Overview & SummaryStarts out as a great lab, but where is your analysis?

Final Mark20/28


pendulum lab mark sheet - studyphysics.ca

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