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# Edexcel A2 Physics Unit 5 'Physics from Creation to Collapse' watch

1. what are the formulas we use for calculating max. velocity and acceleration? are there any other formulas that we should know?
2. (Original post by havinghoops)
Have a look at the image I have attached. I've tried to explain it to you through diagrams
shudnt the velocity be the cos wave and the acceleration be the sine wave?
3. Off to do some last minute revision so best of luck everyone. Let's hope we come out smiling at the end of it.
4. (Original post by BPat)
Off to do some last minute revision so best of luck everyone. Let's hope we come out smiling at the end of it.
Good luck
I feel that it's going to be easier than January's 6PH04 =)
I'm going to revise astro now, it's probably the most difficult part in physics.

best of luck!
5. good luck Guyz I ll be doing the paper in exactly 2 hours.Lets hop that its better than Unit 4
6. All the people on the FP3 thread have lost it

Must do some more Q's this morning
7. (Original post by terminatorsb)
shudnt the velocity be the cos wave and the acceleration be the sine wave?
I explained it wrong. Trying to shorten it too much :P

Hope this makes sense to you.

Whether you use sine or cosine depends on the wave you have, and that all depends on WHEN you start your clock on the SHM.
Attached Images

8. (Original post by havinghoops)
I explained it wrong. Trying to shorten it too much :P

Hope this makes sense to you.

Whether you use sine or cosine depends on the wave you have, and that all depends on WHEN you start your clock on the SHM.
Yes much better
Thank you!!!!!!!!!!!
9. We don't need to know how to devise an experiment to prove somethings in SHM do we?
10. (Original post by Uberuvy)
We don't need to know how to devise an experiment to prove somethings in SHM do we?
we might do!
11. Doubt it. They will probs put an Excel question in there about SHM
12. (Original post by JayAyy)
Doubt it. They will probs put an Excel question in there about SHM

They always seem to have at least one experiment. Lets hope it's the easy radiation one!
13. (Original post by lilangel890)

They always seem to have at least one experiment. Lets hope it's the easy radiation one!
Yup, spreadsheet kinda one. And they will probs give you a random equation too

I hope it's on radiation or on thermal energy. That will definitly make me happy.
14. (Original post by JayAyy)
Yup, spreadsheet kinda one. And they will probs give you a random equation too

I hope it's on radiation or on thermal energy. That will definitly make me happy.
Ohh like unit 1 was with the mechanics. So that'd probably be for heat etc.

Yeah the thermal energy woule be nice as well, I need to go and learn the gas one's though
15. guys someone explain me the example in astrophysics on page 188 the centauri
16. (Original post by lilangel890)
Ohh like unit 1 was with the mechanics. So that'd probably be for heat etc.

Yeah the thermal energy woule be nice as well, I need to go and learn the gas one's though
I'll probs do what I do best: make up a random experiment and explain it well
Dunno if it will get me marks though
17. (Original post by JayAyy)
I'll probs do what I do best: make up a random experiment and explain it well
Dunno if it will get me marks though
For which? I can make some key points for them if you want?

Have you lot learnt about Charles' law (v is proporional to T) It doesn't appear in any of my revision guides (only pressure and Boyle's law)??
18. (Original post by lilangel890)
For which? I can make some key points for them if you want?

Have you lot learnt about Charles' law (v is proporional to T) It doesn't appear in any of my revision guides (only pressure and Boyle's law)??
I'll be fine, but thanks for offering

I think I have. I learnt about it yesterday when I was thinking to myself 'Who the hell is Charles?!'. I kinda understand it. Going to school in a minute for some last minute revision (which I don't normally do )
19. (Original post by JayAyy)
I'll be fine, but thanks for offering

I think I have. I learnt about it yesterday when I was thinking to myself 'Who the hell is Charles?!'. I kinda understand it. Going to school in a minute for some last minute revision (which I don't normally do )
But not learnt it in class? Hmm then maybe that experiment won't come up

Good luck
20. Only less 2 hours left for exam Guys!!!!Good Luck all the physics students on TSR

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