Hey! Sign in to get help with your study questionsNew here? Join for free to post

M1 question help

Announcements Posted on
Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
    • Thread Starter


    I don't understand this question 4ia from Jan10 OCR:
    Name:  m111.png
Views: 26
Size:  161.8 KB
    Why isn't the answer just 0.4gcos60 and 0.4gsin60 if the particle is at rest? I don't understand why you must calculate the difference

    Also, in 7iii in the question below, why does Fr = 7sin30 – 0.42

    Attachment 550863550869

    How come you minus the 0.42, from the force of friction between P and B - I would have thought that that force only acted on P? Because P is the only thing moving, and B is stationary, then wouldn't the force act down the slope (against the direction of motion of P). Sorry this is such a jumble of ideas, but any help is much appreciated?

    Thank you in advance!
    Attached Images

    For q4 have you taken into the tension in the string due to the second mass?
Write a reply…


Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  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
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: June 18, 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.

Cats: Yay or nay?
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read here first


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
Study resources

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

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