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

OCR Breadth - Need help with a question! watch

Announcements
    • Thread Starter
    Offline

    2
    ReputationRep:
    Hi, I was wondering if anyone could help me with the following question:

    http://i.imgur.com/qwYHCwA.png

    For some reason the things on the mark scheme were never taught to us and I never came across it in my textbook, so if you could explain it or link me some material to study that would be amazing! =)

    Thanks in advance!
    Offline

    13
    ReputationRep:
    Can't give you the direct answer sorry
    I can help tho.

    Momentum.

    Sum of moments in left direction = Sum of moments in right direction.

    What is the horizontal momentum? Is the water moving left or right before it hits the floor?
    Offline

    10
    ReputationRep:
    That's part of the new specification sadly, what's on the markscheme is often not in any textbook, it's so much about application of knowledge. As you're just looking for an explanation, this is to do with the conservation of momentum. The overall momentum in this system has to be constant and I believe the way they word it is that "if one drop were to go in one direction, it must be paired by another going in the opposite direction" or something along those lines. As momentum is a vector quantity, the direction part is important when thinking about it being conserved.
    Another example I've seen is for a grenade exploding, same principle as the fragments must conserve momentum as a whole and do the same as this water situation.
    • Thread Starter
    Offline

    2
    ReputationRep:
    Thanks to all of you . That makes perfect sense now! I just needed to be thinking about conservation of momentum and it all clicks!
    Offline

    13
    ReputationRep:
    (Original post by gedr)
    Thanks to all of you . That makes perfect sense now! I just needed to be thinking about conservation of momentum and it all clicks!
    +1 rep for you for being a good student in asking questions.
 
 
 
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?
Help with your A-levels

All the essentials

The adventure begins mug

Student life: what to expect

What it's really like going to uni

Rosette

Essay expert

Learn to write like a pro with our ultimate essay guide.

Uni match

Uni match

Our tool will help you find the perfect course for you

Study planner

Create a study plan

Get your head around what you need to do and when with the study planner tool.

Study planner

Resources by subject

Everything from mind maps to class notes.

Hands typing

Degrees without fees

Discover more about degree-level apprenticeships.

A student doing homework

Study tips from A* students

Students who got top grades in their A-levels share their secrets

Study help links and info

Can you help? Study help unanswered threadsRules and posting guidelines

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.