Turn on thread page Beta
    • Thread Starter
    Offline

    16
    ReputationRep:
    Name:  Screenshot_2016-03-21-08-35-42.jpg
Views: 100
Size:  200.3 KB for this question, my answer is completely different to this. Can anyone check as I have attempted this twice and came out with the same answer. Thanks.Attachment 514535514537
    Attached Images
     
    Offline

    22
    ReputationRep:
    (Original post by coconut64)
    Name:  Screenshot_2016-03-21-08-35-42.jpg
Views: 100
Size:  200.3 KB for this question, my answer is completely different to this. Can anyone check as I have attempted this twice and came out with the same answer. Thanks.Attachment 514535514537
    Your reaction force should be R = 4g \times \cos \alpha not \sin \alpha.
    • Thread Starter
    Offline

    16
    ReputationRep:
    (Original post by Zacken)
    Your reaction force should be R = 4g \times \cos \alpha not \sin \alpha.
    Thats what I did. The first picture is the mark scheme I found online. The second picture is my working. Thanks.
    Offline

    22
    ReputationRep:
    (Original post by coconut64)
    Thats what I did. The first picture is the mark scheme I found online. The second picture is my working. Thanks.
    You multiplied your 4g by 4/5, that's \sin \alpha.
    • Thread Starter
    Offline

    16
    ReputationRep:
    (Original post by Zacken)
    You multiplied your 4g by 4/5, that's \sin \alpha.
    Oh yeah that's a terrible mistake. Thanks.
    Offline

    22
    ReputationRep:
    (Original post by coconut64)
    Oh yeah that's a terrible mistake. Thanks.
    Same for your line of working that starts with "NII" it should be \sin \alpha there, but you've used 3/5.

    No problem.
    • Thread Starter
    Offline

    16
    ReputationRep:
    (Original post by Zacken)
    Same for your line of working that starts with "NII" it should be \sin \alpha there, but you've used 3/5.

    No problem.
    Do you mind helping me with this question? No one has replied. Thanks! http://www.thestudentroom.co.uk/show....php?t=3966009
    Offline

    22
    ReputationRep:
    (Original post by coconut64)
    Do you mind helping me with this question? No one has replied. Thanks! http://www.thestudentroom.co.uk/show....php?t=3966009
    Aye, I'll get on it in an hour or so, if I forget, please tag/quote me and remind me.
    • Community Assistant
    • Study Helper
    Offline

    20
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by Zacken)
    Aye, I'll get on it in an hour or so, if I forget, please tag/quote me and remind me.
    I'm all over it.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 25, 2016

University open days

  • University of Warwick
    Undergraduate Open Days Undergraduate
    Sat, 20 Oct '18
  • University of Sheffield
    Undergraduate Open Days Undergraduate
    Sat, 20 Oct '18
  • Edge Hill University
    Faculty of Health and Social Care Undergraduate
    Sat, 20 Oct '18
Poll
Who is most responsible for your success at university
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

Equations

Best calculators for A level Maths

Tips on which model to get

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

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.