Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta

What happened to the http://www.rdoh.com/exams/ watch

    • Thread Starter
    Offline

    0
    ReputationRep:
    anyone knows? just wanted to get answers for M2 specimen paper but the site is not working.
    Offline

    2
    ReputationRep:
    dont know about that site but you can always try

    http://www.mrhughes.net/Maths/Hidden%20Pages/login.htm

    username:alevel
    password:mrhughes

    they should have it
    Offline

    2
    ReputationRep:
    (Original post by lexazver203)
    anyone knows? just wanted to get answers for M2 specimen paper but the site is not working.
    pete2004 was indirectly responsible.
    Offline

    2
    ReputationRep:
    ignore my post above,just had a look and they dont have the one you want
    Offline

    2
    ReputationRep:
    (Original post by Jonny W)
    pete2004 was indirectly responsible.
    Really? How come? Did edexcel find they were breaching copyright laws?
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by chats)
    ignore my post above,just had a look and they dont have the one you want
    yeah just looked there are no solutions for any of the M2 papers
    Offline

    2
    ReputationRep:
    (Original post by Bezza)
    Did edexcel find they were breaching copyright laws?
    Possibly. Or the owner of the site took it down as a precaution.
    • Thread Starter
    Offline

    0
    ReputationRep:
    Well maybe you can help

    partivle A mass m moving with speed 3u
    particle B mass 2m moves in the opposite direction to A at speed of u.
    After collision the direction of A is reversed.
    (a) Show that speed of B after the collision = 1/3(1+4e)u - done that
    (b) Show that e>1/8 cannot do that one.

    Some help please.
    Offline

    2
    ReputationRep:
    Let p and q be the velocities of A and B after the collision, both measured in the direction of A's initial movement.

    (i)
    Conservation of momentum:
    3mu - 2mu = mp + 2mq,
    u = p + 2q.

    Newton's experimental law:
    (q - p) = 4eu.

    So:
    q - (u - 2q) = 4eu,
    3q = u(1 + 4e),
    q = u(1 + 4e)/3.

    (ii)
    p
    = u - 2q
    = u(1 - (2/3)(1 + 4e))
    = u(1 - 8e)/3

    We know that the direction of A is reversed after the collision. So p < 0. So e > 1/8.
    Offline

    0
    ReputationRep:
    this any good http://www.ajimal.com/download/alevel/main.htm
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by Jonny W)
    Let p and q be the velocities of A and B after the collision, both measured in the direction of A's initial movement.

    (i)
    Conservation of momentum:
    3mu - 2mu = mp + 2mq,
    u = p + 2q.

    Newton's experimental law:
    (q - p) = 4eu.

    So:
    q - (u - 2q) = 4eu,
    3q = u(1 + 4e),
    q = u(1 + 4e)/3.

    (ii)
    p
    = u - 2q
    = u(1 - (2/3)(1 + 4e))
    = u(1 - 8e)/3

    We know that the direction of A is reversed after the collision. So p < 0. So e > 1/8.
    you see the thing is we havent done newtowns experimentaal law and i have no idea whatit is.
    Offline

    2
    ReputationRep:
    Newton's experimental law
    = Newton’s law of restitution
    = What the coefficient of restitution e means
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by Jonny W)
    Newton's experimental law
    = Newton’s law of restitution
    = What the coefficient of restitution e means
    ok we've done that one just never heard it was called an experimental law.

    Are q and p the speeds of 2 particles after the collision then?
    Offline

    1
    ReputationRep:
    if you're looking for the answers for the specimen, go the the edexcel website (or whichever board you're doing) and download the specimen materials.

    It includes the markscheme.
 
 
 
Poll
Do you like carrot cake?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

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