You are Here: Home >< Maths

# M1 question

Announcements Posted on
Last day to win £100 of Amazon vouchers - don't miss out! Take our quick survey to enter 24-10-2016

1. I dont know how to do question 8(b). I guess I need to find the reaction force first. But i dont know how to find it, please help
2. (Original post by alesha98)

I dont know how to do question 8(b). I guess I need to find the reaction force first. But i dont know how to find it, please help
Since there is no vertical acceleration, the reaction is equal to the weight of the particle.
3. (Original post by notnek)
Since there is no vertical acceleration, the reaction is equal to the weight of the particle.
So for Q, the reaction force is 3g.
For P, the reaction force is 2g?
4. (Original post by alesha98)
So for Q, the reaction force is 3g.
For P, the reaction force is 2g?
That's correct.
5. (Original post by notnek)
That's correct.
Thanks, one more question. When doing this type of question, should i consider the particles as a whole single system, or two separate particles?
6. (Original post by alesha98)
Thanks, one more question. When doing this type of question, should i consider the particles as a whole single system, or two separate particles?
The particles are moving in the same straight line so it's okay to consider the whole system. And you can also consider the particles separately.

For a question like this you often may need to consider the whole system for one part of the question and a single particle for another.

Have a go at the question and post your working if you get stuck.

## 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: May 4, 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