Join TSR now and get all your revision questions answeredSign up now
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hi guys, I have no idea how to deal with vectors in 3D. Please help!
    Attached Images
     
    Offline

    0
    ReputationRep:
    (Original post by DonnieBrasco)
    Hi guys, I have no idea how to deal with vectors in 3D. Please help!
    Try to find the angle between the force and the plane useing the dot product maybe? Then when you know the angle, you should be fine from there

    Edit: i think my method gets 2.31 newtons, so if that's what the book says then try the dot product
    Offline

    3
    ReputationRep:
    (Original post by DonnieBrasco)
    Hi guys, I have no idea how to deal with vectors in 3D. Please help!
    From the equation of the plane read down the
    normal vector of the plane
    Then calculate the coordinates of unit vector in this direction
    \frac{\vec n}{|\vec n|}=\vec u_n
    The force F component will be the dot product of F and u_n
    • Thread Starter
    Offline

    0
    ReputationRep:
    Ok thanks guys!


    Posted from TSR Mobile
 
 
 
Poll
If you won £30,000, which of these would you spend it on?
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

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.