FP3 Radius of curvature of curve

Maths and statistics discussion, revision, exam and homework help.

Announcements Posted on
TSR launches Learn Together! - Our new subscription to help improve your learning 16-05-2013
IMPORTANT: You must wait until midnight (morning exams)/4.30AM (afternoon exams) to discuss Edexcel exams and until 1pm/6pm the following day for STEP and IB exams. Please read before posting, including for rules for practical and oral exams. 28-04-2013
Sign in to Reply
  1. purplesparks14's Avatar
    • Full Member
    • Posts: 129
    FP3 Radius of curvature of curve
    Found this in the old P6 papers, adapted to FP3 syllabus. Do explain?

    Find the exact value of the radius of curvature of the curve with equation y = arcsin x at the point where x = (sq root 2)/2.

    The mark scheme gave: [ 1 + (dy/dx)^2 ] / (d2y/dx2). WHY?
  2. GreenLantern1's Avatar
    • Banned
    • Posts: 3,316
    • Warning points: 1000
    Re: FP3 Radius of curvature of curve
    (Original post by purplesparks14)
    Found this in the old P6 papers, adapted to FP3 syllabus. Do explain?

    Find the exact value of the radius of curvature of the curve with equation y = arcsin x at the point where x = (sq root 2)/2.

    The mark scheme gave: [ 1 + (dy/dx)^2 ] / (d2y/dx2). WHY?
    I have no clue!
  3. purplesparks14's Avatar
    • Full Member
    • Posts: 129
    Re: FP3 Radius of curvature of curve
    (Original post by GreenLantern1)
    I have no clue!
    Hahaha neither do I!
  4. Intriguing Alias's Avatar
    • TSR Idol
    • Location: Yorkshire
    Re: FP3 Radius of curvature of curve
    (Original post by purplesparks14)
    Found this in the old P6 papers, adapted to FP3 syllabus. Do explain?

    Find the exact value of the radius of curvature of the curve with equation y = arcsin x at the point where x = (sq root 2)/2.

    The mark scheme gave: [ 1 + (dy/dx)^2 ] / (d2y/dx2). WHY?
    I'm pretty certain this isn't on any FP3 syllabus. Which exam board are you on?
  5. purplesparks14's Avatar
    • Full Member
    • Posts: 129
    Re: FP3 Radius of curvature of curve
    (Original post by hassi94)
    I'm pretty certain this isn't on any FP3 syllabus. Which exam board are you on?
    Edexcel, sorry! Should have mentioned. Something similar to this is also in FP2 2006 past year. I hope it's an old syllabus thing!
  6. ghostwalker's Avatar
    • Outcast of Imrryr
    • Location: CA13
    Re: FP3 Radius of curvature of curve
    (Original post by purplesparks14)
    The mark scheme gave: [ 1 + (dy/dx)^2 ] / (d2y/dx2). WHY?
    Typo.
  7. Intriguing Alias's Avatar
    • TSR Idol
    • Location: Yorkshire
    Re: FP3 Radius of curvature of curve
    (Original post by purplesparks14)
    Edexcel, sorry! Should have mentioned. Something similar to this is also in FP2 2006 past year. I hope it's an old syllabus thing!
    Well I'm pretty sure the formula should actually have a ^3/2 in there so it's not correct, furthermore I don't think it's on your syllabus. According to the specification there is absolutely no mention of radius of curvature in Edexcel FP2 or 3.
Sign in to Reply
Share this discussion:  
Article updates
Moderators

We have a brilliant team of more than 60 volunteers looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Reputation gems:
The Reputation gems seen here indicate how well reputed the user is, red gem indicate negative reputation and green indicates a good rep.
Post rating score:
These scores show if a post has been positively or negatively rated by our members.