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# M2 collisions question

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1. Edexcel January 2013, question 7. a)

Basically just a normal collision question, but in the mark scheme for part (a) it says "(1-3e) is A0", I don't get why. I checked Arsey's model answers and he wrote (1-3e) so are we both wrong or am I misinterpreting it?
2. (Original post by 雷尼克)
Edexcel January 2013, question 7. a)

Basically just a normal collision question, but in the mark scheme for part (a) it says "(1-3e) is A0", I don't get why. I checked Arsey's model answers and he wrote (1-3e) so are we both wrong or am I misinterpreting it?
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3. (Original post by ghostwalker)
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damn I thought it was just the links to the physicsandmaths tutor pages :/
4. (Original post by 雷尼克)
damn I thought it was just the links to the physicsandmaths tutor pages :/
It's given that the direction of A is reversed, so your velocity needs the correct sign. Since the question is asking for speed, it needs to be the magntiude. You'll need to put up your diagram and working so I can see if you've gotten the directions correct.

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