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*Leaving Cert Applied Maths Thread*

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    #512
    OMGeary
    Registered Users Posts: 251 ✭✭OMGeary


    kittychan wrote:
    hi I am going to do applied maths as my 8th subject, I plan on teaching myself. But I have a question which chapters belong to which topic. I mean we have 10 questions in the exam so which chapters belong to which question in Oliver Murphy's book? ( the book has 14 chapters)


    If you list the chapters I'll tell you, but vectors isn't a question but you need to know them


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    #513
    kittychan
    Registered Users Posts: 32 ✭kittychan


    OMGeary wrote: »
    If you list the chapters I'll tell you, but vectors isn't a question but you need to know them

    sure :)
    Chp. 1 - vectors
    Chp. 2- Uniform Acceleration
    Chp. 3- Projectiles on the horizontal plane
    Chp. 4- Relative Velocity
    Chp. 5- Newton's Law and Connected particles
    Chp. 6- Work, Power, energy and Momentum
    Chp. 7- Impacts and Collisions
    Chp. 8- statics
    Chp. 9- hydrostatics
    Chp. 10- Projectiles on the inclined plane
    Chp. 11- circular Motion
    Chp. 12- differential equations
    Chp. 13- Simple Harmonic motion
    Chp. 14- Moments of inertia


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    #514
    Alex Meier
    Closed Accounts Posts: 663 ✭✭✭Alex Meier


    I wouldn't recommend the use of Murphy's book as it contains too many easy questions.

    Some topics, like Relative Velocity, aren't covered in that book to the standards required in the examination.

    I'm a teacher BTW.


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    #515
    kittychan
    Registered Users Posts: 32 ✭kittychan


    Alex Meier wrote: »
    I wouldn't recommend the use of Murphy's book as it contains too many easy questions.

    Some topics, like Relative Velocity, aren't covered in that book to the standards required in the examination.

    I'm a teacher BTW.

    well I already bought the book, i guess i can practice exams?


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    #516
    spurious
    Moderators, Category Moderators, Education Moderators Posts: 27,130 CMod ✭✭✭✭spurious


    Make sure to check the syllabus. Anything in it can be asked, even if it has never been asked before.


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    #517
    OMGeary
    Registered Users Posts: 251 ✭✭OMGeary


    kittychan wrote:
    sure Chp. 1 - vectors Chp. 2- Uniform Acceleration Chp. 3- Projectiles on the horizontal plane Chp. 4- Relative Velocity Chp. 5- Newton's Law and Connected particles Chp. 6- Work, Power, energy and Momentum Chp. 7- Impacts and Collisions Chp. 8- statics Chp. 9- hydrostatics Chp. 10- Projectiles on the inclined plane Chp. 11- circular Motion Chp. 12- differential equations Chp. 13- Simple Harmonic motion Chp. 14- Moments of inertia


    Q1. Ch.2 uniform acc.
    Q2. Ch 4 relative velocity
    Q3. Ch3. And ch 10. Projectiles
    Q4. Ch 5. Newton and connected particles
    Q5. Ch7 impacts and collisions
    Q6. Ch 11 and ch 13 circular and simple harmonic motion
    Q7.ch 8 statics
    Q8.ch 14 inertia
    Q9. Ch9 hydrostatics
    Q 10. Ch 12 differential equations
    Ch 6 is linked with q 4 or 5 not sure which and vectors isn't a question but you need to know how they work.
    I would suggest start doing exam paper questions from the start so you get used them
    thephysicsteacher.ie is also very good for help


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    #518
    UhmMaths?!
    Registered Users Posts: 12 ✭UhmMaths?!


    I'm stuck on a question guys:

    Q2 page34

    A car can move with acceleration 3a and deceleration 5a. Find in terms of k, the time taken to cover a distance of 90ak^2 (k is squared) from rest to rest.

    i) subject to speed limit of 15ak
    ii) subject to no speed limit.

    Help is much appreciated guys!


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    #519
    OMGeary
    Registered Users Posts: 251 ✭✭OMGeary


    UhmMaths?! wrote:
    i) subject to speed limit of 15ak ii) subject to no speed limit.


    Useful tip, draw a speed time graph for both scenarios and fill out what you know


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    #520
    UhmMaths?!
    Registered Users Posts: 12 ✭UhmMaths?!


    Ya doing it in school only in 5th year and liking it so far...
    OMGeary wrote: »
    Useful tip, draw a speed time graph for both scenarios and fill out what you know

    Ok now what did that but I still don't know what equation or anything


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    #521
    DublinArnie
    Closed Accounts Posts: 2,823 ✭✭✭DublinArnie


    UhmMaths?! wrote: »
    I'm stuck on a question guys:

    Q2 page34

    A car can move with acceleration 3a and deceleration 5a. Find in terms of k, the time taken to cover a distance of 90ak^2 (k is squared) from rest to rest.

    i) subject to speed limit of 15ak
    ii) subject to no speed limit.

    Help is much appreciated guys!

    The 90ak^2 is the total area.

    Draw a speed and time graph, and make sure to draw the lines properly. The line for deceleration should be much much steeper than the acceleration line.

    Split the graph into seperate sections (rectangles and triangles), and then let the equation for total area of graph = the distance.


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    #522
    rotawo
    Registered Users Posts: 3 ✭rotawo


    Hey I'm doing applied math on year, i heard you only have to do 6 questions out of 10, but reading post in this, i see some people are talking about attempting 7-8. Is that allowed and if so how does that work?, does your top 6 attempt get picked ???


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    #523
    rotawo
    Registered Users Posts: 3 ✭rotawo


    Hey I'm doing applied math on year, i heard you only have to do 6 questions out of 10, but reading post in this, i see some people are talking about attempting 7-8. Is that allowed and if so how does that, does your top 6 attempt get picked ???


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    #524
    skippy1977
    Registered Users Posts: 284 ✭✭skippy1977


    Yep, only your six best are counted but you can 'attempt' as many as possible. I think most people cover 7 or 8 questions prior to the exam in case one of their 6 preferred ones proves to be very tricky or dissimilar to questions they have practiced.

    Obviously time during the exam becomes an issue the more questions you do so even though people will have prepared 7 questions they may still just do 6 on the day.


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    #525
    rotawo
    Registered Users Posts: 3 ✭rotawo


    Is anyone selling an applied math book? Preferably fundamental of applied mathematics by Oliver murphy


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    #526
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    Doing question one on exam papers and stuck on 2007 1(b)
    01EbETv.png

    Got down as far as:

    q8Hmwb8.png

    No idea where to get a value for b. :/


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    #527
    hubluh
    Registered Users Posts: 69 ✭✭hubluh


    Liordi wrote: »
    Doing question one on exam papers and stuck on 2007 1(b)
    01EbETv.png

    Got down as far as:

    q8Hmwb8.png

    No idea where to get a value for b. :/

    That question is a worked example in the textbook.


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    #528
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    Oh, wow. Thanks.
    I've not got my book with me but I'll have a look on Monday. :)


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    #529
    Peregrine
    Moderators, Education Moderators Posts: 26,399 Mod ✭✭✭✭Peregrine


    Liordi wrote: »
    Oh, wow. Thanks.
    I've not got my book with me but I'll have a look on Monday. :)

    Do you have a final answer that you're supposed to get? I got b = 1 but it was just a mental calculation. I'll do it properly if it's right or if you insist.

    You have two expressions for avg speed. Equate them and just solve for b. It simplifies nicely :)


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    #530
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    I looked on examinations.ie and b was = 1.
    Just had no clue why.

    I figure there's someway of finding out 2qd = v?


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    #531
    Peregrine
    Moderators, Education Moderators Posts: 26,399 Mod ✭✭✭✭Peregrine


    Liordi wrote: »
    I looked on examinations.ie and b was = 1.
    Just had no clue why.

    I figure there's someway of finding out 2qd = v?

    2qd/v is z.

    http://i.imgur.com/jzLgbHh.jpg

    The left hand side is multiplied and divided by v so you can cancel out the v. Try and solve it from there.


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    #532
    mkmkmk4
    Registered Users Posts: 8 ✭mkmkmk4


    Is it possible to do the whole course in 6 months? Probably a very stupid question but I might aswell ask


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    #533
    bpb101
    Registered Users Posts: 2,827 ✭✭✭bpb101


    mkmkmk4 wrote: »
    Is it possible to do the whole course in 6 months? Probably a very stupid question but I might aswell ask
    can you math? , No can you really math? and do you do physics?


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    #534
    DublinArnie
    Closed Accounts Posts: 2,823 ✭✭✭DublinArnie


    Anyone have a chapter they really hate?

    Relative Velocity is a pain, I can do it if everything is layer out but when reading the questions, I struggle to know what I need to do. (especially the river questions!)


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    #535
    bpb101
    Registered Users Posts: 2,827 ✭✭✭bpb101


    DublinArnie wrote: »
    Anyone have a chapter they really hate?

    Relative Velocity is a pain, I can do it if everything is layer out but when reading the questions, I struggle to know what I need to do. (especially the river questions!)
    If i remember correctly that was always one of the easiest questions. I know some are hard, but its one to get high marks in


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    #536
    mkmkmk4
    Registered Users Posts: 8 ✭mkmkmk4


    bpb101 wrote: »
    can you math? , No can you really math? and do you do physics?

    Yeah , I usually get B1-A1 in Maths and Bs in Physics


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    #537
    bpb101
    Registered Users Posts: 2,827 ✭✭✭bpb101


    mkmkmk4 wrote: »
    Yeah , I usually get B1-A1 in Maths and Bs in Physics
    i presume both hl?

    yeah then it can be done.
    Its about a 3 classes a week course for 2 years. imo
    But you can do it tactically and do the questions that always come up.

    Just keep doing questions.
    There are a few people here who have done it the 6 months and have done well.They would be in the best place to help you.

    Sent you a pm also.


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    #538
    sdio
    Registered Users Posts: 49 ✭sdio


    mkmkmk4 wrote: »
    Is it possible to do the whole course in 6 months? Probably a very stupid question but I might aswell ask

    I'd say so if you're good at maths.. But I'd recommend not doing all the questions. I did 7 questions in 4-5 months and I think that was enough. I had to study every day though, it wasn't easy!


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    #539
    Dr C.V
    Registered Users Posts: 1 ✭Dr C.V


    would anyone have any copies of past mock DEB papers? Finished all the exam qs and I have no idea what to do now.


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    #540
    bpb101
    Registered Users Posts: 2,827 ✭✭✭bpb101


    Dr C.V wrote: »
    would anyone have any copies of past mock DEB papers? Finished all the exam qs and I have no idea what to do now.
    Have you went back to the 70s yet

    I dont think anybody has done all of these
    http://www.thephysicsteacher.ie/exammaterialappliedmaths.html

    Marking schems going back to 93 and some topic 1970


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    #541
    DublinArnie
    Closed Accounts Posts: 2,823 ✭✭✭DublinArnie


    anarchonel wrote: »
    Our school gives us two classes a week and then an hour and a half after school. The real shame is that we're collectively forced to do non exam religion for 4 classes a week, more than we get for applied maths which we chose and is worth 100 points.

    +1


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