Turn on thread page Beta

M1 dynamics question watch

    • Thread Starter

    A (0.3kg) is on a rough horizontal plane and B (0.5kg) is hanging from a pulley P attached at the end, with 0.6m between B and the ground
    There is 1m between A and P. The coefficient of friction of the plane is 0.4.
    I have already worked out the acceleration of the particles which is 4.655
    When B hits the ground it doesnt rebound.
    *Find the speed of A as it reaches P

    (the answer is 1.57 to 3sf)

    Please go through the method for this question and how you achieve the correct answer
    Many thanks

    Assuming A and B are joined by string...

    1) find the speed of A after it has travelled 0.6m, using constant acceleration equations (same as speed of B)
    2) work out new acceleration of A (deceleration) now that there is no tension in the string
    3) use the constant acceleration equations, you know u, a and s

    Post your working if you don't get the right answer.
Submit reply
Turn on thread page Beta
Updated: May 19, 2010

University open days

  • University of East Anglia
    All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
    Wed, 30 Jan '19
  • Aston University
    Postgraduate Open Day Postgraduate
    Wed, 30 Jan '19
  • Solent University
    Careers in maritime Undergraduate
    Sat, 2 Feb '19
Brexit: Given the chance now, would you vote leave or remain?
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


Best calculators for A level Maths

Tips on which model to get

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.