Turn on thread page Beta
    • Thread Starter
    Offline

    12
    ReputationRep:


    I got the right answer for this question but I used F = μR whereas they used F≤μR

    So in the end I got F/R = μ , whereas they got F/R≤μ

    How do we determine whether to use the ''='' sign or the ''≤' sign ?
    Offline

    16
    ReputationRep:
    (Original post by sabre2th1)


    I got the right answer for this question but I used F = μR whereas they used F≤μR

    So in the end I got F/R = μ , whereas they got F/R≤μ

    How do we determine whether to use the ''='' sign or the ''≤' sign ?
    Only when there is motion can you be sure that friction is acting at it's maximum

    In this instance the wording of the question was a pointer to the sign
    • Thread Starter
    Offline

    12
    ReputationRep:
    (Original post by TenOfThem)
    Only when there is motion can you be sure that friction is acting at it's maximum

    In this instance the wording of the question was a pointer to the sign
    Thanks. What part of the wording exactly indicated this?
    Offline

    16
    ReputationRep:
    (Original post by sabre2th1)
    Thanks. What part of the wording exactly indicated this?
    "the least possible value"

    you have found the least possible value anyway
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 5, 2013
Poll
Do you think parents should charge rent?
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

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.