rxrx2004
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in this question, what does 'zero momentum frame relative to the laboratory frame.' mean?

https://isaacphysics.org/questions/t...&stage=a_level
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Phystech
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It probably refers to the rest frame
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rxrx2004
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(Original post by Phystech)
It probably refers to the rest frame
still confused, sorry
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Joinedup
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The hints are quite good.

What you're used to doing normally is measure relative to fixed objects in the lab which you assume are stationary... but if you were measuring the same collision from the reference point of the centre of mass of the two particle system it'd look like the particles were coming in towards the centre of mass from opposite directions. That's what the question is asking you to think about.

I don't think this is in A level specs BTW
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