x Turn on thread page Beta
 You are Here: Home >< Maths

# M2 Collisions watch

1. I'm having problems with part b of this question. The mark scheme says that because the velocity of Q is less than zero, therefore e is greater than 1/6, I don't see how they made this connection.

I've attached the question and mark scheme, thanks for your help.
Attached Images

2. (Original post by Seytonic)
I'm having problems with part b of this question. The mark scheme says that because the velocity of Q is less than zero, therefore e is greater than 1/6, I don't see how they made this connection.

I've attached the question and mark scheme, thanks for your help.
the direction is reversed, so that expression for v1 above has to be less than zero, from this you can easily see that e>1/6
3. (Original post by nexttimeigetvpn)
the direction is reversed, so that expression for v1 above has to be less than zero, from this you can easily see that e>1/6
Ah I see, I was considering the wrong velocity. Thanks for your help.
4. (Original post by nexttimeigetvpn)
the direction is reversed, so that expression for v1 above has to be less than zero, from this you can easily see that e>1/6
How did they get the first part of the answer for the range?

Posted from TSR Mobile

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: June 14, 2016
Today on TSR

### University rankings 2019

Cambridge at number one

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams