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HSC Physics Marathon 2013-2015 Archive (2 Viewers)

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Fizzy_Cyst

Fizzy_Cyst

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re: HSC Physics Marathon Archive

Hahaha :)

Best of luck for tomorrow mate :)

I know you will smash it! :)

Pls SMS me when ur out and let me know how you went!
 
iBibah

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re: HSC Physics Marathon Archive

Fizzy_Cyst said:
Hahaha :)

Best of luck for tomorrow mate :)

I know you will smash it! :)

Pls SMS me when ur out and let me know how you went!
Click to expand...
I(m pretty good for modules, Q2Q im running through now, its been a while

yep will do
 
Fizzy_Cyst

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Physics marathon archive

I am 27 hours early, but I am thinking we should start a 2014 thread for current HSC students.

I will endeavour to compile all the questions from the 2013 thread over the next week and link that document in this thread.

The HSC Physics Marathon is an open chain of questions between students. It works by answering a question then posting another question and allowing the cycle to repeat itself.

Rules:
- After answering a question, always provide a new one - this is what keeps the thread alive.
- Allocate a number of marks for any question that you post.
- Do not cheat, if you cannot answer a question, do not search how to answer the question but rather, allow other students to answer the question.
- No copyrighted questions (eg CSSA and Independent) should be posted.

Tips:
- It may help to write your answers on paper before typing them on this thread as it will mirror your exam.
- You may post more than one question.
- When possible, after questions have been answered, you can peer mark using the marking scheme.



Lets start off with a question about acceleration due to gravity!

Question:
Determine the NET (effective) acceleration due to gravity along Jupiters equator: (4 marks)
Length of day on Jupiter: 9 hours 56mins
Mass of Jupiter: 317.8 x Mass of Earth
Equatorial radius: 69,911km
Jupiters orbital radius: 778 million km
 
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Chris100

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Re: HSC Physics Marathon 2014

Using the g=(Gm)/r^2 formula and assuming that Earth's approximate mass is 6x10^24kg;
g=(6.67x10^-11x317.8x6x10^24)/(69911000)^2
=30ms^-2(1s.f)
Did I get the sig fig right?(did I even get the answer right lol)
Btw, thanks for posting the thread
 
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Chris100

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Re: HSC Physics Marathon 2014

The distance between the Moon and the Earth from their centres is 3.84x10^8 m. The moon circles the Earth once every 27.3 days and the mass of the Moon is 7.475x10^22kg.
Calculate the Moon's linear velocity
 
Fizzy_Cyst

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Re: HSC Physics Marathon 2014

Chris100 said:
Using the g=(Gm)/r^2 formula and assuming that Earth's approximate mass is 6x10^24kg;
g=(6.67x10^-11x317.8x6x10^24)/(69911000)^2
=30ms^-1(1s.f)
Did I get the sig fig right?(did I even get the answer right lol)
Btw, thanks for posting the thread
Click to expand...
I would give you 1/4 :)

There is more to the question :)

Answer it as you would an examination question! You are required to use an equation which is not in the formula sheet, so what is the first thing which you should do?

No probs! Thanks for my first ever 'like'!
 
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Chris100

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Re: HSC Physics Marathon 2014

Oh wow, we won't be given the gravity formula? Where can I find online a list of formulas that will be given to us in the hsc exam?
Also, that would mean I would have to derive the formula by equating the law of gravitational attraction and F=mg? But I feel like there is even more to the question hmmm
 
Fizzy_Cyst

Fizzy_Cyst

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Re: HSC Physics Marathon 2014

Chris100 said:
Oh wow, we won't be given the gravity formula? Where can I find online a list of formulas that will be given to us in the hsc exam?
Also, that would mean I would have to derive the formula by equating the law of gravitational attraction and F=mg? But I feel like there is even more to the question hmmm
Click to expand...

http://www.boardofstudies.nsw.edu.au/syllabus_hsc/pdf_doc/physics-formulae-sheet.pdf

That sheet is what you will be given in your HSC! Note: no equation for 'g', so yes, you must first 'derive' the equation :)

There is more to it :)

1 mark - derive equation for 'g'
1 mark - sub in values to determine 'g' at the equator

The other 2 marks are to do with the terms 'net' and 'effective' :) Meaning, that 'g' is not the only acceleration experienced on the equator of Jupiter :) what else is there?
 
rumbleroar

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Hey general q, not related to physics, but why is it frowned upon to post questions from independent or CSSA papers? I noticed you mentioned that as a rule and was genuinely curious. Thanks :)
 
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