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

    1
    ReputationRep:
    Ok, I understand how to calculate all of the angles and forces quite well, I could easily pass that. What I don't quite understand is how to figure out the angles on an inclined plane after drawing the model. I draw the model as a sketch to help and add on all the necessary forces but after that o can't figure out the correct angles to use. Any help would be very much appreciated because I'm teaching myself this and don't have anyone else to ask. Thanks
    Offline

    2
    ReputationRep:
    I'm not quite sure what you're asking. What angles are you having difficulty finding?
    Offline

    0
    ReputationRep:
    usually true,

    parallel to slope mainly sin (theta)
    perpendicular to slope cos (theta)

    I would still recommend drawing the triangles on the diagram
    Offline

    0
    ReputationRep:
    Draw the triangles is always the best way.

    One method I picked up is whether or not you want the majority of the force - in a hypothetical example, where the angle of the plane, \theta < 45 /degree , to the horizontal the weight of an object is mostly acting into the slope, perpendicular to it. As, when theta is less than 45 degrees,  cos \theta > sin \theta , we want the larger and thus the cosine of the angle, so the component of the weight perpendicular to the slope is mg cos \theta .

    That probably wasn't very clear, but I hope you get my drift.
 
 
 
  • 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
    Has a teacher ever helped you cheat?
    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

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