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# M2 Collisions

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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.
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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?

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