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Can anyone help me with Mechanics? Or is this out of your range?

. A uniform rod AB, of mass m and length 2a, is free to rotate about a fixed smooth axiswhich passes through A and is perpendicular to the rod. The rod has angular speed ω whenit strikes a particle P of mass m and adheres to it. Immediately before the rod strikes P, Pis at rest and at a distance x from A. Immediately after the rod strikes P, the angular speedof the rod is 34 ω .
Find x in terms of a.





Ive modelled the question, but couldnt find what x can comes out to be

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Reply 1
Avatar for TeeEm
TeeEm
19
Original post by naxiv
. A uniform rod AB, of mass m and length 2a, is free to rotate about a fixed smooth axiswhich passes through A and is perpendicular to the rod. The rod has angular speed ω whenit strikes a particle P of mass m and adheres to it. Immediately before the rod strikes P, Pis at rest and at a distance x from A. Immediately after the rod strikes P, the angular speedof the rod is 34 ω .
Find x in terms of a.


the rod sped up after hitting a stationary particle?


Ive modelled the question, but couldnt find what x can comes out to be


the rod sped up after hitting a stationary particle?

definitely out of my range
Reply 2
Avatar for naxiv
naxiv
OP
3
Yes i know this
I cant find x out??
Original post by TeeEm
the rod sped up after hitting a stationary particle?

definitely out of my range
Reply 3
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TeeEm
19
Original post by naxiv
Yes i know this
I cant find x out??


what do you mean find x?

the scenario is not possible (a typo maybe)
Reply 4
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naxiv
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Im sure it is
Original post by TeeEm
what do you mean find x?

the scenario is not possible (a typo maybe)
Reply 5
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TeeEm
19
Original post by naxiv
Im sure it is


then I am definitely beaten

marktoon_man_pulling_hair_out1.gif
Reply 6
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naxiv
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Original post by TeeEm
then I am definitely beaten

marktoon_man_pulling_hair_out1.gif


Do you teach M5?
Reply 7
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TeeEm
19
Original post by naxiv
Do you teach M5?


rarely these days
Reply 8
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naxiv
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How is it in comparism to university maths?
Original post by TeeEm
rarely these days
Reply 9
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TeeEm
19
Original post by naxiv
How is it in comparism to university maths?


comparing mechanics I assume

university mechanics are harder.

Anything mathematical at University is harder (that is the whole point)
Original post by naxiv
. A uniform rod AB, of mass m and length 2a, is free to rotate about a fixed smooth axiswhich passes through A and is perpendicular to the rod. The rod has angular speed ω whenit strikes a particle P of mass m and adheres to it. Immediately before the rod strikes P, Pis at rest and at a distance x from A. Immediately after the rod strikes P, the angular speedof the rod is 34 ω .
Find x in terms of a.





Ive modelled the question, but couldnt find what x can comes out to be


Surely that should say 3/4 not 34
Reply 11
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naxiv
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Original post by TenOfThem
Surely that should say 3/4 not 34

3/4w sorry
Original post by TeeEm
the rod sped up after hitting a stationary particle?

definitely out of my range



Original post by TenOfThem
Surely that should say 3/4 not 34



Original post by naxiv
3/4w sorry



So the question is no longer impossible

Conserved energy, surely
(edited 9 years ago)
Reply 13
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naxiv
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Original post by TenOfThem
So the question is no longer impossible


Sorry :smile::smile:
Reply 14
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TeeEm
19
Original post by TenOfThem
So the question is no longer impossible

Conserved energy, surely


well it is possible but it is angular momentum that is conserved
(energy will be lost)
Original post by TeeEm
well it is possible but it is angular momentum that is conserved
(energy will be lost)


Fair enough - I top out in teaching at M2 - I have done M3 but not for ages
Reply 16
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naxiv
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Why?:smile:
Original post by TenOfThem
Fair enough - I top out in teaching at M2 - I have done M3 but not for ages
Reply 17
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TeeEm
19
Original post by TenOfThem
Fair enough - I top out in teaching at M2 - I have done M3 but not for ages


I was not having a go ...
Original post by naxiv
Why?:smile:


Lots of reasons - mainly the call for anything beyond the 2s is minimal - and usually from people who will self study with support rather than a taught class
Original post by TeeEm
I was not having a go ...


Didn't think you were

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