The truth is in circular motion, the angular 'velocity' w is really angular speed, i.e. w is ALWAYS defined to be > 0. Hence |w| makes no difference.
Hi,
Context: When looking at the 2007 HSC Q 3 d) ii) where they asked for what values of w is N >), the MANSW solutions obtain that w^2 < g/rtan(Theta), and then state |w| < (g/rtan(theta))^0.5 . However, for the 2016 HSC Q 13 c) ii) they asked for what range of values of w is T_2 > T_1, their solutions state |w| > (200/3)^0.5) and then say w > 0, thus w > (200/3)^0.5 (though I couldn't find in the question that w>0)
Question: Is there a discrepancy between the different tests and their solutions? Or could someone please explain why for the 2016 w>0?
Thanks
Mathematics Extension 2 - Physics - Chemistry - Economics - English Advanced
The truth is in circular motion, the angular 'velocity' w is really angular speed, i.e. w is ALWAYS defined to be > 0. Hence |w| makes no difference.
Ok, so in the HSC I should always just take the positive root of w, as w is always > 0?
Mathematics Extension 2 - Physics - Chemistry - Economics - English Advanced
Offering tutoring for Biology, Maths, Maths Ext 1, and Maths Ext 2.
Solar Education - CHEAP Quality Tutoring
Buy my books/notes cheaply here!
--------------------------------------------------------------------------------
2016 HSC (Accelerated): // 2U Maths (97) // SOR 1 (48) //
2017 HSC: // English Adv // Bio // Phys // 3U Maths // 4U Maths //
Goal: 99.8+
Great! Thanks guys, will do
Mathematics Extension 2 - Physics - Chemistry - Economics - English Advanced
There are currently 1 users browsing this thread. (0 members and 1 guests)
Bookmarks