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# Edexcel Physics Unit 1 17th May 2012

Physics exam discussion - share revision tips in preparation for GCSE, A Level and other physics exams and discuss how they went afterwards.

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1. Re: Edexcel Physics Unit 1 17th May 2012
(Original post by raheem94)
Can somebody please explain why the answer to this question is 'b'.

Since the lift starts at 0ms_1, it has to accelerate to start moving. Since it is moving upwards, this acceleration is positive. Once it reaches it's speed, the acceleration goes to 0 as it is moving at constant velocity. When it's about to reach the desired floor, it has to decelerate. This acceleration is negative. Once it has hit 0ms^-1, the stops decelerating and remains at rest.

Hope this helps =]
2. Re: Edexcel Physics Unit 1 17th May 2012
In what chapter of the book d they mention logic gates?
3. Re: Edexcel Physics Unit 1 17th May 2012
(Original post by LegendX)
In what chapter of the book d they mention logic gates?
I don't remember logic gates at all. You doing Edexcel?
4. Re: Edexcel Physics Unit 1 17th May 2012
Yeh
5. Re: Edexcel Physics Unit 1 17th May 2012
Light gates even
6. Re: Edexcel Physics Unit 1 17th May 2012
I'm sue there is n real mention of light gates and then they've just randomly put p an exam question.
7. Re: Edexcel Physics Unit 1 17th May 2012
(Original post by Zues)
Since the lift starts at 0ms_1, it has to accelerate to start moving. Since it is moving upwards, this acceleration is positive. Once it reaches it's speed, the acceleration goes to 0 as it is moving at constant velocity. When it's about to reach the desired floor, it has to decelerate. This acceleration is negative. Once it has hit 0ms^-1, the stops decelerating and remains at rest.

Hope this helps =]

+rep
8. Re: Edexcel Physics Unit 1 17th May 2012
Raheem ur retaking this exam?
9. Re: Edexcel Physics Unit 1 17th May 2012
(Original post by LegendX)
Light gates even
Oh light gates. They come up in mechanics. Usually for experiments as they are more accurate since people can have different reaction times so using a stopwatch can be inaccurate.

I'm gonna go to bed so good luck everyone =]
10. Re: Edexcel Physics Unit 1 17th May 2012
(Original post by LegendX)
Raheem ur retaking this exam?
Yes, got 98/120 in jan, will try to do better this time.
11. Re: Edexcel Physics Unit 1 17th May 2012
as i revised the past year questions
i realised they kept making questions on the application of eddies due to turbulent flow
can anybody list down the effects of eddies on a moving object?
thank you =)
12. Re: Edexcel Physics Unit 1 17th May 2012

13. Re: Edexcel Physics Unit 1 17th May 2012
given that weight is 638 newton

isnt the equation:
W= Tsin 40
T= W divide sin40
right?
14. Re: Edexcel Physics Unit 1 17th May 2012
(Original post by zulfarhan92)
given that weight is 638 newton

isnt the equation:
W= Tsin 40
T= W divide sin40
right?
Yes i think you're correct
15. Re: Edexcel Physics Unit 1 17th May 2012
(Original post by zulfarhan92)
as i revised the past year questions
i realised they kept making questions on the application of eddies due to turbulent flow
can anybody list down the effects of eddies on a moving object?
thank you =)
basically all that turbulent flow does to a moving object is slow it down.
16. Re: Edexcel Physics Unit 1 17th May 2012
my exam is in a couple of hours...im freaking out T_T
goodluck everyone
17. Re: Edexcel Physics Unit 1 17th May 2012
(Original post by youlostme)
my exam is in a couple of hours...im freaking out T_T
goodluck everyone
mine starts in 2 and a half hours calm down its gonna be good if u freak out there is a posibillity of forgetting stuff you already know goodluck
18. Re: Edexcel Physics Unit 1 17th May 2012
im doing the exam aswel. hope i dont panic. best of luck to everyone.
19. Re: Edexcel Physics Unit 1 17th May 2012
guyz i need a link to all the deffenetions we need to know for todaaay !!! have no tie left !!!
20. Re: Edexcel Physics Unit 1 17th May 2012
Can someone open a new tread now to go on after the exam so we can discuss it? lol

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