Turn on thread page Beta
    • Thread Starter

    Hey, I was wondering if anyone could help me make sense of this question, it reads

    6. Two cyclists, Ann and Bob, travel from P to Q along a straight path. Ann starts from rest as bob passes her at 3.5ms-1. Bob continues at this speed while Ann accelerates at 0.2ms-2 for T seconds until she attains her highest speed. at this moment both cyclists immediately start to slow down with constant but different decelerations, and they both come to rest at Q, 80 seconds after Ann started moving.
    a) sketch both the velocity time graphs
    b) if both cyclists travel the same distance, find
    i) the value of T
    ii) the distance between p and Q
    iii) the magnitude of bobs deceleration

    Thanks for the help, don't worry this isn't for a test or assessment and this is the only question out of 20 that i cant seem to make head nor tail of :P

    Erm.....well Bob will start out with a horizontal line at 3.5, and then at T seconds go down with some gradient ending up at 80 seconds.

    The other one will start at the origin, go vertical with a gradient of 0.2, and at time T, her velocity will be 0.2T, and at this point will go down again and finish at 80, so will be a lopsided triangle.

    As there is only one unknown (T) you should be able to work it out as both areas are the same.

    I reckon the area of the first guy is 3.5T + 0.5(80-T)(3.5) and the second guy is 0.5(T)(0.2T) + 0.5(80-T)(0.2T)

    you can work that out easy.
Submit reply
Turn on thread page Beta
Updated: January 26, 2010
The home of Results and Clearing


people online now


students helped last year

University open days

  1. SAE Institute
    Animation, Audio, Film, Games, Music, Business, Web Further education
    Thu, 16 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Fri, 17 Aug '18
  3. University of Bolton
    Undergraduate Open Day Undergraduate
    Fri, 17 Aug '18
Do you want your parents to be with you when you collect your A-level results?
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

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.