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I think you want this forum http://community.boredofstudies.org/forumdisplay.php?f=1057

re: HSC Physics Marathon Archive You forgot to change volume into appropriate units! Should be in m^3, not L :)

re: HSC Physics Marathon Archive I get a different answer, closer to 1.5x10-4. Planets velocity is a distractor. Can u guys show working? :-)

re: HSC Physics Marathon Archive Challenge? Question: A space cowboy is standing on the surface of a spherical asteroid of mass 1000kg and volume 1ML and is moving through space at 1000ms-1. He launches a 100g rock directly upwards and it reaches a maximum height of 1125m, it then falls down...

You have plenty of info :) time to max height (i.e., Vy = 0) = 3.75s (half of total time of flight) , assuming it is on Earth, you can find Uy and hence you can find delta_Y \o/

Re: HSC 2013 4U Marathon $Find the roots of$ \ \ \frac{3x^4}{2} - \frac{11x^3}{2} + 5x - 2 = 0

No aim for Physics?! Keep up the good work :)

re: HSC Physics Marathon Archive If the probe is a distance of 'r' fron Saturn, think about an expression for the distance away from Jupiter :-) If ur really stuck, I will put up working :-)

re: HSC Physics Marathon Archive Must. Come. Up. With. Something. Harder. For. BOS. Nerds.

re: HSC Physics Marathon Archive Freddo Frog for you, young Padawan!

re: HSC Physics Marathon Archive I will send a Freddy frog to the first person to get part 2 of my previous question correct * * conditions apply

re: HSC Physics Marathon Archive 1 is correct 2 is incorrect :)

re: HSC Physics Marathon Archive Sorry, should have specified! The craft is between Jupiter and Saturn for Q2. So, nope, not at infinity :)

re: HSC Physics Marathon Archive 2 questions. 1: determine the gravitational force acting on the probe at its current location. 2: determine the distance away from Saturn which it must be in order to experience no NET gravitational force :)

Not too far ahead! Even if you just stay one or two lessons ahead, so that when you get into class, you already have an underlying understanding of the concept and you can ask higher-order questions.

You should be able to use either. If the numbers given are accurate, the value will come out to be exactly the same. Just make sure for both equations, you show where they came from

Obvs reference to my basketball skills :) Hahaha :) Didn't we use t-formula to get it out eventually? LoL Or Auxillary Angle.. I can't remember, LoL. I had better brush up on that question before we I through it next week! Haha

Depending on the difficulty of your tasks, Probably approx 80% for both Ext 1 and Ext 2 80% aligns to around 95 for both those subjects

Thx for bump :) Moving on to projectile motion this week! :)

re: HSC Physics Marathon Archive Note that 45 degrees is only max range if there's no change in y displacement! I.e., starts on ground, finishes on ground