ATAR Notes: Forum
VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Specialist Mathematics => Topic started by: Zebra on November 09, 2011, 09:47:24 pm
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2007 question 5.
WHY DO YOU USE CONSTANT ACC FORMULA?????????????????????????????????????????????????//
WHERE DOES IT TELL YOU THE ACC IS CONSTANT??????????????????????????????????????????????????
why can't you just use initial v, final v, time to work out acc?
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my fucking goodness....
no sleep tonight!
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Are you talking about exam 1? The acceleration is definitely constant, because there are no forces acting on it except friction (and friction is a constant force here).
edit: and yes you can, and you ARE using the initial/final v and time.
edit2: what I meant by my first edit is:
the constant accel formula is this: v=u+at. That is precisely using the initial and final velocities and time taken ie, a = (v-u)/t
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Ha just did this exam. :)
Constant forces = constant acceleration.
You are not given t so you have to use v^2 = u^2 + 2as where s = 3, u = 4 and v = 0.
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Ha just did this exam. :)
Constant forces = constant acceleration.
You are not given t so you have to use v^2 = u^2 + 2as where s = 3, u = 4 and v = 0.
Oops, my mistake. Read 3 seconds instead of 3m hah :D
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Ha just did this exam. :)
Constant forces = constant acceleration.
You are not given t so you have to use v^2 = u^2 + 2as where s = 3, u = 4 and v = 0.
Oops, my mistake. Read 3 seconds instead of 3m hah :D
same.
okay. i thought this shit was new guys. thanks! and good luck...
if you guys are not asleep, 2006 question 4)a) (exam 1) ?
i used lami's and got it wrong!
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got it. thanks to itute... !
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When you prove a rectangle, do you have to prove ALL angles are right angles?
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When you prove a rectangle, do you have to prove ALL angles are right angles?
No just one pair of sides afaik.
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You can also prove that the diagonals are of equal length
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So say for ABCD, would you be able to attain full marks if you just proved angle(ABC) and angle(BAC) are right angles?
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You can also prove that the diagonals are of equal length
How would you differentiate a square from a rectangle then, if you just prove that the diagonals are equal in magnitude? (I'm thinking that this is a stupid Q which I know the answer to :P)
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You can also prove that the diagonals are of equal length
How would you differentiate a square from a rectangle then, if you just prove that the diagonals are equal in magnitude? (I'm thinking that this is a stupid Q which I know the answer to :P)
Lol, to differentiate a square from a rectangle the magnitude of all lengths of the square are the same.
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You can also prove that the diagonals are of equal length
How would you differentiate a square from a rectangle then, if you just prove that the diagonals are equal in magnitude? (I'm thinking that this is a stupid Q which I know the answer to :P)
You don't. Squares are merely a special rectangle. :)
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if asked to prove something is a kite how would you guys do it?
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On one of the assessment reports, VCAA states that a square is a type of rectangle
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FUCK
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if asked to prove something is a kite how would you guys do it?
Let a kite be ABCD, with the longer axis AC and shorter axis BD.
Then you must show that:
|AB|=|AD|
|CB|=|CD|
|AB|=/=|CB|
and that would be sufficient.
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good lord. this didn't come up.
learn it for tmrw!