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Author Topic: ALL CIE PHYSICS DOUBTS HERE !!!  (Read 172175 times)

Offline Deadly_king

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #30 on: October 12, 2010, 05:40:23 pm »
Quote from: Kimo Jesus on October 12, 2010, 03:07:47 pm
a simple test if anyone has the time to do it , good for basics practise



Thanks for your questions buddy  ;)
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Offline Vin

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #31 on: October 14, 2010, 02:16:13 pm »
I need help. :/ This seems to be an easy question but I don't get it at all.

Pg. 111, Q.3 From the book International A/AS Level Physics by Chris Mee, Mike Crundell and others.

A uniform plank of weight 120 N rests on two stools as shown in Fig. 4.39. A weight of 80 N is placed on the plank, midway between the stools. Calculate :
(a) the force acting on the stool at A,
(b) the force acting on the stool at B.

Thanks a lot!
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Offline Vin

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #32 on: October 14, 2010, 02:35:11 pm »
Oh, By the way the answers are (a) 80 N and (b) 120 N. Just in case. ;)
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Offline Deadly_king

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #33 on: October 14, 2010, 03:37:55 pm »
Quote from: ~Vin~ on October 14, 2010, 02:35:11 pm
Oh, By the way the answers are (a) 80 N and (b) 120 N. Just in case. ;)

Are you sure about the answers dude?

Because am getting (a) 88N and (b) 112N

I think there must be some kind of misprint in the book ;)
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Offline lana

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #34 on: October 14, 2010, 09:14:37 pm »
can anyone send me revision notes or anything to help me study please ??
thanks =]
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Offline WARRIOR

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #35 on: October 15, 2010, 06:32:47 am »
Quote from: Deadly_king on October 12, 2010, 05:40:23 pm
Thanks for your questions buddy  ;)
well if u have time can u just solve them and give me the mark scheme? jsut the answers ! caz the whole test would be pointless. i  have my answers but i want to make sure with someone else!
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Offline Deadly_king

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #36 on: October 15, 2010, 07:16:02 am »
Quote from: Kimo Jesus on October 15, 2010, 06:32:47 am
well if u have time can u just solve them and give me the mark scheme? jsut the answers ! caz the whole test would be pointless. i  have my answers but i want to make sure with someone else!
Sorry dude.......I won't have time now since am in exams :-\

Will be glad to help you after that ;)
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Offline ashish

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #37 on: October 15, 2010, 10:30:37 am »
Quote from: Deadly_king on October 14, 2010, 03:37:55 pm
Are you sure about the answers dude?

Because am getting (a) 88N and (b) 112N

I think there must be some kind of misprint in the book ;)


well me too i got 88 and 112



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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #38 on: October 15, 2010, 10:42:09 am »
One reason for the discrepancy maybe that you are using 9.8 for g instead of 10.

Or vice versa.
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Offline Deadly_king

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #39 on: October 15, 2010, 10:43:58 am »
Quote from: Ari Ben Canaan on October 15, 2010, 10:42:09 am
One reason for the discrepancy maybe that you are using 9.8 for g instead of 10.

Or vice versa.

Sorry br0 but g is not used in this question since weight has already been given ;)
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elemis

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #40 on: October 15, 2010, 10:52:42 am »
Quote from: Deadly_king on October 15, 2010, 10:43:58 am
Sorry br0 but g is not used in this question since weight has already been given ;)

I havent even looked at the question closely :P
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Offline Deadly_king

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #41 on: October 15, 2010, 11:01:48 am »
Quote from: Ari Ben Canaan on October 15, 2010, 10:52:42 am
I havent even looked at the question closely :P

If you have time, try it out!

Then let us know your answers ;)
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Offline Ivo

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #42 on: October 15, 2010, 08:15:11 pm »
Please could someone help me with this question; diagram attached.

Three forces are applied to the point O as shown in the diagram.  Calculate: a) The component in directions OX and OY respectively of each of the forces; b) The resultant force acting at O.

Answers I got for part a) (couldn't do b) -

For 6N force: Vertical component (VC) = 4.2N, Horizontal component (HC) = 4.2N

For 8N force: VC = 5.7N, HC = 5.7N

For 14N force: VC = 0N, HC = 14N

I don't know if answers are right, please check kindly.  Also, please explain part b).  Many thanks!  :D
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Offline S.M.A.T

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #43 on: October 15, 2010, 09:26:29 pm »
Quote from: Ivo on October 15, 2010, 08:15:11 pm
Please could someone help me with this question; diagram attached.

Three forces are applied to the point O as shown in the diagram.  Calculate: a) The component in directions OX and OY respectively of each of the forces; b) The resultant force acting at O.

Answers I got for part a) (couldn't do b) -

For 6N force: Vertical component (VC) = 4.2N, Horizontal component (HC) = 4.2N

For 8N force: VC = 5.7N, HC = 5.7N

For 14N force: VC = 0N, HC = 14N

I don't know if answers are right, please check kindly.  Also, please explain part b).  Many thanks!  :D
Here :)................sorry for low visibility :-[
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Offline Ivo

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #44 on: October 15, 2010, 10:43:09 pm »
Quote from: asiftasfiq93 on October 15, 2010, 09:26:29 pm
Here :)................sorry for low visibility :-[

Ahh, a very clever way of doing it!  Thanks!  +rep for you!!!   ;)
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