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

    0
    ReputationRep:
    Force F1=(1,4,-3)kN acting at position R1=(1,1,1)m
    Force F2=(2,1,3)kN acting at position R2=(2,1,3)m

    find the magnitude of the resultant force in kN.
    Offline

    2
    ReputationRep:
    Add together F1 and F2 to get a vector giving the resultant force. Then take the magnitude of that.
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by ttoby)
    Add together F1 and F2 to get a vector giving the resultant force. Then take the magnitude of that.
    so i don't need to worry about the position vectors for this question?
    thanks for the reply.
    Offline

    2
    ReputationRep:
    (Original post by plmqaz)
    so i don't need to worry about the position vectors for this question?
    thanks for the reply.
    Yeah if the question involved moments or something like that then the position of the forces would be important. But you're just taking the resultant which just involves adding the forces since they're already given as vectors.
    Offline

    2
    ReputationRep:
    (Original post by plmqaz)
    so i don't need to worry about the position vectors for this question?
    thanks for the reply.
    Yeah if the question involved moments or something like that then the position of the forces would be important. But you're just taking the resultant which just involves adding the forces since they're already given as vectors.
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by ttoby)
    Yeah if the question involved moments or something like that then the position of the forces would be important. But you're just taking the resultant which just involves adding the forces since they're already given as vectors.
    thanks
 
 
 
  • 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
    What newspaper do you read/prefer?
    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.