« previous next »
Pages: 1 ... 20 21 [22] 23 24 ... 64   Go Down

Author Topic: Edexcel PHYSICS Doubts  (Read 137961 times)

Offline Vin

  • SF V.I.P
  • ********
  • Posts: 7914
  • Reputation: 52609
  • Gender: Male
    • Theory of Life - A new skew.
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.
Logged

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
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.
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline The Golden Girl =D

  • Without Allah I'm nothing <3
  • Honorary Member
  • SF Overlord
  • *****
  • Posts: 13757
  • Reputation: 65532
  • Ain't Nothin worth your tears =D
    • www.thegoldengirl157.blogspot.com
Re: Edexcel PHYSICS Doubts
« Reply #317 on: January 04, 2011, 02:09:01 pm »
And this As well .

Attached.
Logged
Verily, in the remembrance of Allah do hearts find rest(13:28)

Please, Don't forget to Include GG in your Prayers =D

Offline Vin

  • SF V.I.P
  • ********
  • Posts: 7914
  • Reputation: 52609
  • Gender: Male
    • Theory of Life - A new skew.
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.
Logged

Offline The Golden Girl =D

  • Without Allah I'm nothing <3
  • Honorary Member
  • SF Overlord
  • *****
  • Posts: 13757
  • Reputation: 65532
  • Ain't Nothin worth your tears =D
    • www.thegoldengirl157.blogspot.com
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 ~ »
Logged
Verily, in the remembrance of Allah do hearts find rest(13:28)

Please, Don't forget to Include GG in your Prayers =D

Offline Vin

  • SF V.I.P
  • ********
  • Posts: 7914
  • Reputation: 52609
  • Gender: Male
    • Theory of Life - A new skew.
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~ »
Logged

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
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.
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
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 :'(

Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
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
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
Re: Edexcel PHYSICS Doubts
« Reply #324 on: January 04, 2011, 11:46:46 pm »
How to do draw C?
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
Re: Edexcel PHYSICS Doubts
« Reply #325 on: January 04, 2011, 11:48:26 pm »
Markscheme doesn't explain clearly.

Please explain this :)
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
Re: Edexcel PHYSICS Doubts
« Reply #326 on: January 04, 2011, 11:50:15 pm »
Please help!
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
Re: Edexcel PHYSICS Doubts
« Reply #327 on: January 04, 2011, 11:53:13 pm »
How to draw the graph?
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
Re: Edexcel PHYSICS Doubts
« Reply #328 on: January 04, 2011, 11:54:51 pm »
How to do this, plz?
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi

Offline Vampire-Love4ever

  • SF Geek
  • ****
  • Posts: 451
  • Reputation: 13281
  • Gender: Female
  • "Where there is love, there is life." -Gandhi
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?
Logged
"An eye for an eye, only makes the whole world go blind."

-Gandhi
Pages: 1 ... 20 21 [22] 23 24 ... 64   Go Up
« previous next »