Turn on thread page Beta
    • Thread Starter
    Offline

    1
    ReputationRep:
    I'm stuck on q 5 on the OCR November 2002 paper. here's the question:
    An object P of mass 0.2kg hangs by a string from a point O of the roof of a lorry. The lorry is moving horizontally with constant acceleration a m/s^2 and the string makes a constant angle of 8 degrees with the vertical. Find
    i) the tension in the string
    ii) the value of a

    anybody know how to answer this???
    Offline

    15
    ReputationRep:
    (Original post by SI 1)
    I'm stuck on q 5 on the OCR November 2002 paper. here's the question:
    An object P of mass 0.2kg hangs by a string from a point O of the roof of a lorry. The lorry is moving horizontally with constant acceleration a m/s^2 and the string makes a constant angle of 8 degrees with the vertical. Find
    i) the tension in the string
    ii) the value of a

    anybody know how to answer this???
    Resolving forces vertically, you know that Tcos(8) = 0.2g, as there is no acceleration in this direction (forces up = forces down). Then resolve horizontally using F = ma. Does this help?
    • Thread Starter
    Offline

    1
    ReputationRep:
    Here's the diagram for the question
    Attached Images
     
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by ombtom)
    Resolving forces vertically, you know that Tcos(8) = 0.2g, as there is no acceleration in this direction (forces up = forces down). Then resolve horizontally using F = ma. Does this help?
    Yup. Thank you!!!
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 29, 2016

University open days

  1. University of Bradford
    University-wide Postgraduate
    Wed, 25 Jul '18
  2. University of Buckingham
    Psychology Taster Tutorial Undergraduate
    Wed, 25 Jul '18
  3. Bournemouth University
    Clearing Campus Visit Undergraduate
    Wed, 1 Aug '18
Poll
How are you feeling in the run-up to Results Day 2018?

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