Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hi,

    I've done part one of this question, but I'm really struggling with part 2.

    Name:  ImageUploadedByStudent Room1366151100.762881.jpg
Views: 61
Size:  109.1 KB

    I'm struggling with both visualising and sketching the scenario, so any help would be appreciated, cheers


    This was posted from The Student Room's iPhone/iPad App
    • Study Helper
    Offline

    13
    Study Helper
    (Original post by JRW1995)
    ...
    Forget about part 2, for a minute.

    Draw the diagram for part 1, with lines along the x, and y axis as appropriate.

    Then mark on the centre of mass.

    Now draw a line through A and the centre of mass.

    Now rotate your page until A is furthest away from you and the line you have just drawn is vertical, coming towards you.

    You now have the desired image for part 2.
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by ghostwalker)
    Forget about part 2, for a minute.

    Draw the diagram for part 1, with lines along the x, and y axis as appropriate.

    Then mark on the centre of mass.

    Now draw a line through A and the centre of mass.

    Now rotate your page until A is furthest away from you and the line you have just drawn is vertical, coming towards you.

    You now have the desired image for part 2.
    Thanks for your help,

    I managed to get that drawn earlier as well as the AC diagonal, I then had 2 coordinates and the diagonal line and got stuck from there figuring out angles with lengths being in terms of A.

    (If this description made no sense I will upload a photo tomorrow)


    This was posted from The Student Room's iPhone/iPad App
    • Study Helper
    Offline

    13
    Study Helper
    (Original post by JRW1995)
    ...
    It makes sense, but a photo might be useful anyway.

    Yes, it's a little messy.

    One way to find the angle would be find the angle BAC, and the angle BA centre-of-mass.

    Then either subtract or add to get the desired angle - depending on whether the centre of mass is on the B side or D side of the line AC.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.