You are Here: Home >< Maths

# M2 Edexcel June 2015 Paper question 4

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. Hi, I have a query with getting the force 1/3 Rb when I take moments about A

Why is it 1/3Rbcos theta*2l, I thought it will just be 1/3Rb*2l

Im not really sure how to ask this question soz if u dont understand what im asking :s
I managed to get all the other components fine

http://qualifications.pearson.com/co...e_20150609.pdf
2. (Original post by James_pa)
Hi, I have a query with getting the force 1/3 Rb when I take moments about A

Why is it 1/3Rbcos theta*2l, I thought it will just be 1/3Rb*2l

Im not really sure how to ask this question soz if u dont understand what im asking :s
I managed to get all the other components fine

http://qualifications.pearson.com/co...e_20150609.pdf
If Rb/3 is the frictional force at B, then it's line of action is vertical.

The perpendicular distance of that line of action from A, is

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: June 9, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams