Login

Search the forums now!

Welcome, Guest. Please login or register.

September 25, 2025, 11:10:19 pm
Pages: [1] 2   Go Down

Author Topic: Help! Please!  (Read 2918 times)  Share 

0 Members and 1 Guest are viewing this topic.

Twenty10

  • Guest
Help! Please!
« on: March 14, 2010, 04:20:23 pm »
0
A car travels half the distance of a journey at an average speed of 80km/h and half at an average speed of x km/h.
Define a function, S, which gives the average speed for the total journey as a function of x.

Thanks!
Logged

the.watchman

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2526
  • Respect: +10
Re: Help! Please!
« Reply #1 on: March 14, 2010, 04:32:40 pm »
0
Let d be the distance travelled

Then

So



Logged
Remember, remember the 5th of November

2010 - MM CAS (47) - Cisco 1+2 (pass :P)
2011 - Eng - Phys - Chem - Spesh - Latin - UMAT
ATAR - 99.00+ plz... :)

Feel free to PM me for anything :D

m@tty

  • Victorian
  • ATAR Notes Legend
  • *******
  • Posts: 4324
  • Respect: +33
  • School: Heatherton Christian College
  • School Grad Year: 2010
Re: Help! Please!
« Reply #2 on: March 14, 2010, 04:42:41 pm »
0
Which if you wanted to sketch would be better in the form below:



Just thought I should add it ;D
Logged
2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

96.85

2011-2015: Bachelor of Aerospace Engineering and Bachelor of Science, Monash University

2015-____: To infinity and beyond.

Twenty10

  • Guest
Re: Help! Please!
« Reply #3 on: March 14, 2010, 04:48:08 pm »
0
Quote from: the.watchman on March 14, 2010, 04:32:40 pm
Let d be the distance travelled

Then

So




Thanks.
Why does 'd' turn to 1??
Logged

the.watchman

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2526
  • Respect: +10
Re: Help! Please!
« Reply #4 on: March 14, 2010, 04:49:42 pm »
0
Quote from: Twenty10 on March 14, 2010, 04:48:08 pm
Quote from: the.watchman on March 14, 2010, 04:32:40 pm
Let d be the distance travelled

Then

So




Thanks.
Why does 'd' turn to 1??

Divide both numerator and denominator by d :)
Logged
Remember, remember the 5th of November

2010 - MM CAS (47) - Cisco 1+2 (pass :P)
2011 - Eng - Phys - Chem - Spesh - Latin - UMAT
ATAR - 99.00+ plz... :)

Feel free to PM me for anything :D

m@tty

  • Victorian
  • ATAR Notes Legend
  • *******
  • Posts: 4324
  • Respect: +33
  • School: Heatherton Christian College
  • School Grad Year: 2010
Re: Help! Please!
« Reply #5 on: March 14, 2010, 04:51:55 pm »
0
Logged
2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

96.85

2011-2015: Bachelor of Aerospace Engineering and Bachelor of Science, Monash University

2015-____: To infinity and beyond.

Twenty10

  • Guest
Re: Help! Please!
« Reply #6 on: March 14, 2010, 05:02:41 pm »
0
Thanks for the help guys!
Logged

the.watchman

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2526
  • Respect: +10
Re: Help! Please!
« Reply #7 on: March 14, 2010, 05:10:44 pm »
0
Logged
Remember, remember the 5th of November

2010 - MM CAS (47) - Cisco 1+2 (pass :P)
2011 - Eng - Phys - Chem - Spesh - Latin - UMAT
ATAR - 99.00+ plz... :)

Feel free to PM me for anything :D

m@tty

  • Victorian
  • ATAR Notes Legend
  • *******
  • Posts: 4324
  • Respect: +33
  • School: Heatherton Christian College
  • School Grad Year: 2010
Re: Help! Please!
« Reply #8 on: March 14, 2010, 05:15:51 pm »
0
:)
Logged
2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

96.85

2011-2015: Bachelor of Aerospace Engineering and Bachelor of Science, Monash University

2015-____: To infinity and beyond.

Martoman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1476
  • Respect: +11
Re: Help! Please!
« Reply #9 on: March 14, 2010, 07:58:00 pm »
0
I hate unintuitive kinematics. Thanks non cas methods. I love you so.
Logged
2009: Math methods: 50, Psychology: 44
2010: chem 47, further 48, Spesh 49 fml seriously and other yr 11 subs.
2011: Holidaying, screw school.
No. Not azn.
___________________________________
Swedish meal time all the time

the.watchman

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2526
  • Respect: +10
Re: Help! Please!
« Reply #10 on: March 14, 2010, 08:00:32 pm »
0
Quote from: Martoman on March 14, 2010, 07:58:00 pm
I hate unintuitive kinematics. Thanks non cas methods. I love you so.

LOL I used to hate these sorts of questions, but now I love them! :P
Logged
Remember, remember the 5th of November

2010 - MM CAS (47) - Cisco 1+2 (pass :P)
2011 - Eng - Phys - Chem - Spesh - Latin - UMAT
ATAR - 99.00+ plz... :)

Feel free to PM me for anything :D

superflya

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1763
  • EL-Heat.
  • Respect: +8
Re: Help! Please!
« Reply #11 on: March 14, 2010, 08:01:48 pm »
0
why arent u doing physics marto?
Logged
2010- English, Methods (CAS), Physics, Specialist, Chem.
2011- Bachelor of Commerce/Aerospace Engineering - Monash


"The day i stop learning, is the day i walk away from the game" Michael Jordan.

the.watchman

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2526
  • Respect: +10
Re: Help! Please!
« Reply #12 on: March 14, 2010, 08:02:51 pm »
0
Quote from: superflya on March 14, 2010, 08:01:48 pm
why arent u doing physics marto?

Yeah, you should do it in 2011 :)
Logged
Remember, remember the 5th of November

2010 - MM CAS (47) - Cisco 1+2 (pass :P)
2011 - Eng - Phys - Chem - Spesh - Latin - UMAT
ATAR - 99.00+ plz... :)

Feel free to PM me for anything :D

Martoman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1476
  • Respect: +11
Re: Help! Please!
« Reply #13 on: March 14, 2010, 08:22:40 pm »
0
Quote from: superflya on March 14, 2010, 08:01:48 pm
why arent u doing physics marto?

Further is taking up all my time!!!!!!!!!!!!!!!! *sigh*
Logged
2009: Math methods: 50, Psychology: 44
2010: chem 47, further 48, Spesh 49 fml seriously and other yr 11 subs.
2011: Holidaying, screw school.
No. Not azn.
___________________________________
Swedish meal time all the time

superflya

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1763
  • EL-Heat.
  • Respect: +8
Re: Help! Please!
« Reply #14 on: March 14, 2010, 08:36:48 pm »
0
Quote from: Martoman on March 14, 2010, 08:22:40 pm
Quote from: superflya on March 14, 2010, 08:01:48 pm
why arent u doing physics marto?

Further is taking up all my time!!!!!!!!!!!!!!!! *sigh*

LOL as it should be.
Logged
2010- English, Methods (CAS), Physics, Specialist, Chem.
2011- Bachelor of Commerce/Aerospace Engineering - Monash


"The day i stop learning, is the day i walk away from the game" Michael Jordan.
Pages: [1] 2   Go Up