Author Topic: Maths & Physics Help  (Read 60804 times)

Offline emi

  • SF Geek
  • ****
  • Posts: 530
  • Reputation: 2581
  • former member
Re: Maths & Physics Help
« Reply #210 on: May 04, 2009, 09:29:37 pm »
sry for not mentioning .. paper 6
former member

Offline sweetsh

  • Retired Adminstrator
  • SF V.I.P
  • ********
  • Posts: 7049
  • Reputation: 65535
  • Gender: Female
  • *Freedom
Re: Maths & Physics Help
« Reply #211 on: May 04, 2009, 09:39:01 pm »
I think you measure 2cm from A and then draw the normal as a straight line (90o) and then you extend it to reach DC...Label point(F) where it crosses AB and G where it crosses DC..
and ii) im not sure of it really

Offline emi

  • SF Geek
  • ****
  • Posts: 530
  • Reputation: 2581
  • former member
Re: Maths & Physics Help
« Reply #212 on: May 04, 2009, 09:43:08 pm »
u mean the normal will be straight line ,, with 2 cm away from A ?  i tried that but it looks awkward .. made me think its not correct .
you didn't do it ?  because of those steps i cant move forward to solve the rest of that Question
former member

Offline sweetsh

  • Retired Adminstrator
  • SF V.I.P
  • ********
  • Posts: 7049
  • Reputation: 65535
  • Gender: Female
  • *Freedom
Re: Maths & Physics Help
« Reply #213 on: May 04, 2009, 09:49:58 pm »
No actually I didnt do it on real beacause im leaving the 08 papers before the exam a day. In the mark scheme they wrote:
all lines present, thin, neat and in correct area
normal at 90° (by eye)
and EF at 30° to normal (by eye)
line KJ to at least beyond P4

Offline astarmathsandphysics

  • SF Overlord
  • *********
  • Posts: 11271
  • Reputation: 65534
  • Gender: Male
  • Free the exam papers!
Re: Maths & Physics Help
« Reply #214 on: May 04, 2009, 10:05:46 pm »
i do have a silly question here.
could anyone please explain to me for this question:

-OCT/NOV 2008 mathematics paper 2( both variants) question 5.it has smthng that i don't really undrstand.i know its about locus but how? my teacher didnt teach us this type of question.thank you.

Locus - the set of points. As the square is rotated D traces out a circle.

Offline astarmathsandphysics

  • SF Overlord
  • *********
  • Posts: 11271
  • Reputation: 65534
  • Gender: Male
  • Free the exam papers!
Re: Maths & Physics Help
« Reply #215 on: May 04, 2009, 10:18:03 pm »
can any one help me with this physics Question.
M/J 2008 Q4.
(a)- i & ii

thanks

Draw NN' 2cm from A paraLELL TO AD, and the line EF starts 30 to the left coming from the top.

Offline emi

  • SF Geek
  • ****
  • Posts: 530
  • Reputation: 2581
  • former member
Re: Maths & Physics Help
« Reply #216 on: May 04, 2009, 10:29:37 pm »
thanks i did it .. and my answers where coming correct ..

thanks alot
former member

Offline emi

  • SF Geek
  • ****
  • Posts: 530
  • Reputation: 2581
  • former member
Re: Maths & Physics Help
« Reply #217 on: May 04, 2009, 10:46:15 pm »
sry im stuck in the same Question part c) 

they say extend the line EF through Out line of the block to a point J. the line EJ crosses the line CD label this point K

former member

Offline ny

  • Newbie
  • *
  • Posts: 40
  • Reputation: 9
Re: Maths & Physics Help
« Reply #218 on: May 05, 2009, 02:32:15 am »
i don't get it...how?could you show it to me?

Offline unknown

  • SF Immigrant
  • **
  • Posts: 123
  • Reputation: 228
Re: Maths & Physics Help
« Reply #219 on: May 05, 2009, 04:44:52 am »
hmmmmm sir ccan u help me wth d phy q atleast i understood d maths 1 plzzz its okay whenever u return home pls ans my query
thx a million in advance n i wldnt mind if others can help me out 2

Offline astarmathsandphysics

  • SF Overlord
  • *********
  • Posts: 11271
  • Reputation: 65534
  • Gender: Male
  • Free the exam papers!
Re: Maths & Physics Help
« Reply #220 on: May 05, 2009, 07:41:29 am »
sry im stuck in the same Question part c) 

they say extend the line EF through Out line of the block to a point J. the line EJ crosses the line CD label this point K



Just carry on the line EF. It doesnt matter where J is as long as it is on the other side of the block.

Offline ny

  • Newbie
  • *
  • Posts: 40
  • Reputation: 9
Re: Maths & Physics Help
« Reply #221 on: May 05, 2009, 12:05:25 pm »
i think i figured it out.Thanks

Offline emi

  • SF Geek
  • ****
  • Posts: 530
  • Reputation: 2581
  • former member
Re: Maths & Physics Help
« Reply #222 on: May 05, 2009, 12:45:15 pm »
i did it ,, but then it wud hit the right side ob the block not the lower side maybe because of the angel ?   i will post how i did it can you tell me wats the mistake ?

can any one attach the M/J 08 paper 6 ? i cant get to FEP ..  so i can show the block
former member

Offline sweetsh

  • Retired Adminstrator
  • SF V.I.P
  • ********
  • Posts: 7049
  • Reputation: 65535
  • Gender: Female
  • *Freedom
Re: Maths & Physics Help
« Reply #223 on: May 05, 2009, 12:51:56 pm »
Here is it

Offline emi

  • SF Geek
  • ****
  • Posts: 530
  • Reputation: 2581
  • former member
Re: Maths & Physics Help
« Reply #224 on: May 05, 2009, 12:54:59 pm »
i think i did my 30 degree angel wrong or else it wouldn't be like this.
this might sound silly but what position should i keep my protractor ?
former member