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Author Topic: Edexcel PHYSICS Doubts  (Read 137930 times)

Offline Vin

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Re: Edexcel PHYSICS Doubts
« Reply #315 on: January 04, 2011, 01:29:13 pm »
I'm confused. :/ Which questions have not been answered? Plus, please post the whole paper because I dont do edexcel.
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #316 on: January 04, 2011, 01:33:59 pm »
Quote from: ~Vin~ on January 04, 2011, 01:29:13 pm
I'm confused. :/ Which questions have not been answered? Plus, please post the whole paper because I dont do edexcel.
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Offline The Golden Girl =D

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Re: Edexcel PHYSICS Doubts
« Reply #317 on: January 04, 2011, 02:09:01 pm »
And this As well .

Attached.
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Offline Vin

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Re: Edexcel PHYSICS Doubts
« Reply #318 on: January 04, 2011, 02:26:08 pm »
Weight of Person (W) = 750 N cuz the initial reading states the weight.

While crouching down, weight does not change. therefore, W = 750N
and, from graph, R = 340 N

Clearly there has been a printing error. You cant really rely on old past papers I think.

Arrow W is longer cuz the magnitude of the vector is greater than that of R.
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Re: Edexcel PHYSICS Doubts
« Reply #319 on: January 04, 2011, 02:29:59 pm »
Vin : Dude thank ya  =D
« Last Edit: January 04, 2011, 02:33:28 pm by ~ The Golden Girl ~ »
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Offline Vin

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Re: Edexcel PHYSICS Doubts
« Reply #320 on: January 04, 2011, 02:45:41 pm »
haha no problem.

For the second one, take two points, for instance check the attatchment.

It is advised that you select points from over more than half of the line.

I took, (1.1, 3) & (2.8, 8.4)

m = y2 - y1 / x2 - x1
    = 8.4 - 3 / 2.8 - 1.1
    = 3.18 x10^3

I believe CIE always gives and a range of values, though I'm pretty much not sure about edexcel.
« Last Edit: January 04, 2011, 02:50:47 pm by ~Vin~ »
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #321 on: January 04, 2011, 09:23:27 pm »
Quote from: ~Vin~ on January 04, 2011, 02:26:08 pm
Weight of Person (W) = 750 N cuz the initial reading states the weight.

While crouching down, weight does not change. therefore, W = 750N
and, from graph, R = 340 N

Clearly there has been a printing error. You cant really rely on old past papers I think.

Arrow W is longer cuz the magnitude of the vector is greater than that of R.

Thanks alot for your help.
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #322 on: January 04, 2011, 11:35:28 pm »
I have many doubts and I am totally relying on this thread.
Please! Please! Help me out if you can!
I am a week away from my exam :'(

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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #323 on: January 04, 2011, 11:40:07 pm »
Why do we use Sin here instead of Cos? :S

Answer from markscheme: Use of mgh   1
Vertical drop per second = (8.4 m) sin (3°)   1
3.9 × 102 J/Js–1/W
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #324 on: January 04, 2011, 11:46:46 pm »
How to do draw C?
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #325 on: January 04, 2011, 11:48:26 pm »
Markscheme doesn't explain clearly.

Please explain this :)
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #326 on: January 04, 2011, 11:50:15 pm »
Please help!
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #327 on: January 04, 2011, 11:53:13 pm »
How to draw the graph?
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #328 on: January 04, 2011, 11:54:51 pm »
How to do this, plz?
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Offline Vampire-Love4ever

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Re: Edexcel PHYSICS Doubts
« Reply #329 on: January 04, 2011, 11:57:05 pm »
i-i know how to do it!
ii-How to calculate the tension? why do we use sin here instead of cos?
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