Hey there! Sign in to join this conversationNew here? Join for free

moment Watch

Announcements
    • Thread Starter
    Offline

    0
    ReputationRep:
    For Question B I got 3 unknown and when I sub in the equation. always get 0
    Attached Images
      
    Offline

    15
    ReputationRep:
    (Original post by Mars Chan)
    For Question B I got 3 unknown and when I sub in the equation. always get 0
    I cannot see reactions in your diagram but the reaction at C will be zero
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by TeeEm)
    I cannot see reactions in your diagram but the reaction at C will be zero
    yep C is R1 and I already find out the equation of moment of C
    Offline

    15
    ReputationRep:
    (Original post by Mars Chan)
    yep C is R1 and I already find out the equation of moment of C
    when the mass is max, the reaction at C is zero
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by TeeEm)
    when the mass is max, the reaction at C is zero
    My friend told me that as well. But can you explain me why?
    Offline

    15
    ReputationRep:
    (Original post by Mars Chan)
    My friend told me that as well. But can you explain me why?
    I wish I could but my brain is severely constipated after teaching non stop from 13.00 to 23.00.
    Ask me the same question tomorrow and I promise not to evade you

    Name:  O1.jpg
Views: 24
Size:  250.4 KB
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by TeeEm)
    I wish I could but my brain is severely constipated after teaching non stop from 13.00 to 23.00.
    Ask me the same question tomorrow and I promise not to evade you

    Name:  O1.jpg
Views: 24
Size:  250.4 KB
    is ok thank you for answering.
    Offline

    21
    ReputationRep:
    (Original post by Mars Chan)
    is ok thank you for answering.
    Resolve vertically. You now have a constraint. on T_c.
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by TeeEm)
    I wish I could but my brain is severely constipated after teaching non stop from 13.00 to 23.00.
    Ask me the same question tomorrow and I promise not to evade you

    Name:  O1.jpg
Views: 24
Size:  250.4 KB
    Hello if you have time can you answer me thank you
    Offline

    15
    ReputationRep:
    (Original post by Mars Chan)
    Hello if you have time can you answer me thank you
    If you increase the mass at B, bit by bit there will come an instant where the rod will topple over (equilibrium is broken by turning about D)

    When this happens the rod will not be touching the support at C in other words the reaction at C will be zero
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by TeeEm)
    If you increase the mass at B, bit by bit there will come an instant where the rod will topple over (equilibrium is broken by turning about D)

    When this happens the rod will not be touching the support at C in other words the reaction at C will be zero
    sorry what do you mean by equilibrium is broken by turning about D
    Offline

    15
    ReputationRep:
    (Original post by Mars Chan)
    sorry what do you mean by equilibrium is broken by turning about D
    can't you visualize that?
 
 
 
  • 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
    Should Spain allow Catalonia to declare independence?
    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.