Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter

    I'm currently studying "Dynamics of a particle moving in a straight line", chapter 3 in my M1 Edexcel textbook.

    Anyways, when should I be showing that I am calculating Fmax or F?

    I know Fmax = uR (where u is 'myoo').

    Am I right in saying, in an exam, I should show that I am calculating Fmax when there is acceleration of the particle in the opposite direction, or when the opposing force (e.g. tension) is equal to Fmax? So tension is equal to the limiting value:

    Fmax >= uR

    Is that right?

    Thank you

    The magnitude of the frictional force can take a range of values. F<=μR
    If an object is in limiting equilibrium - it means that the object is on the verge of moving - it is staying still but the frictional force is at a maximum and any more forward force will overcome the frictional force and the object will start moving/accelerating. If an object is moving then the frictional force will be at a maximum.
    In an exam you could state that since an object is not stationary then you know that the friction takes a maximum value.
Submit reply
Turn on thread page Beta
Updated: October 27, 2015
Do you like carrot cake?
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here


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