# Maths Mechanics- Need help!!Watch

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#1
Could someone explain to me how to solve these two mechanics questions. They are from the AQA mechanics 1b June 2014 paper.
Thanks

I have done question 7a and have got the position vector as (20i+20j)m
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4 years ago
#2
(Original post by gloria0816)
Could someone explain to me how to solve these two mechanics questions. They are from the AQA mechanics 1b June 2014 paper.
Thanks

I have done question 7a and have got the position vector as (20i+20j)m
For Q5, have you tried using the Conservation of linear momentum? That is momentum before = momentum afterwards?
If you want more hints just quote me
For Q7, for the particles collide, say at some time, T, we would say that they have the same position at this time.
If we have a velocity vector, we know that v =dx/dt (velocity is the rate of change of displacement (x) with time) so if we integrate the velocity vector, we will get the position vector. Remember that we will get a constant of integration which can be found by using the conditions for t=0.

Try these and get back to me with how you go, feel free to ask me for any more hints/how I would do the question
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