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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 230815 times)

Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1980 on: May 26, 2010, 03:24:03 pm »
Quote from: ambitious94 on May 26, 2010, 03:15:12 pm
Can anyone please help me with June 2009. 9 (b)? And also Q 11 (b)? THANKS

I dunno how to prepare to phy, I've done overall almost all papers from 2002 onwards. Should I read the theory or repeat the papers (since I didnt do them all today, did them in 3 or 4 months). A lil advice wud b appreciated!

9B) red-->blue-->green-->yellow

ATTACHED
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Offline tunnellord

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1981 on: May 26, 2010, 03:26:01 pm »
Quote
okay guys if speed of a moving object is constant then the acceleration is 0.......i noe i m rite.....but is resultant force and acceleration the same thing

Yes u are right about speed.
However, resultant force causes an accelleration. it is not the same
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1982 on: May 26, 2010, 03:26:22 pm »
Quote from: //~|guMnam|~\\ on May 26, 2010, 03:20:04 pm
okay guys if speed of a moving object is constant then the acceleration is 0.......i noe i m rite.....but is resultant force and acceleration the same thing ???


If the acceleration = 0, meaning the resultant force = 0. provided the body is already in motion.
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Offline rhea

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1983 on: May 26, 2010, 03:27:36 pm »
can someone tele how to draw a simple version of a spring balance?
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1984 on: May 26, 2010, 03:29:30 pm »
Quote from: mdwael on May 26, 2010, 03:16:50 pm
can someone draw me the circuit for question 8 (a) in May june 2008 summer paper 3 physics second variant?

Sorry for the rubbish diagram!
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Offline guMnam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1985 on: May 26, 2010, 03:30:58 pm »
Quote from: A@di on May 26, 2010, 03:26:22 pm

If the acceleration = 0, meaning the resultant force = 0. provided the body is already in motion.
aaa so ht means if a object is moving its not important tht a resultant force is acting on it....???? i m really confused....i think tht acceleraion is 0...but there is a resultant force becaz object is moving in a direction...in a straioght line....steady speed..
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1986 on: May 26, 2010, 03:32:13 pm »
Quote from: //~|guMnam|~\\ on May 26, 2010, 03:30:58 pm
aaa so ht means if a object is moving its not important tht a resultant force is acting on it....???? i m really confused....i think tht acceleraion is 0...but there is a resultant force becaz object is moving in a direction...in a straioght line....steady speed..

OK, here:

No resultant force: either object at rest, or object moving at CONSTANT speed.

Resultant force: acceleration at the same direction as resultant force.

Got that? :D
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Offline J.Darren

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1987 on: May 26, 2010, 03:32:34 pm »
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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1988 on: May 26, 2010, 03:32:52 pm »
A@di. From 2009 onwards the first question is ALWAYS experimental. They ask us to plan some experiment.


Can you list all the COMMON IGCSE Physics Experiments we should know....

Much appreciated man ! ;)
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Offline guMnam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1989 on: May 26, 2010, 03:33:04 pm »
Quote from: tunnellord on May 26, 2010, 03:26:01 pm
Yes u are right about speed.
However, resultant force causes an accelleration. it is not the same

so if accelaration is 0...resultant force is 0???
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1990 on: May 26, 2010, 03:34:09 pm »
Quote from: //~|guMnam|~\\ on May 26, 2010, 03:33:04 pm
so if accelaration is 0...resultant force is 0???

f=ma  Assuming mass is constant, if acc. is 0, then resultant force is 0.  That's correct.
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1991 on: May 26, 2010, 03:39:45 pm »
Whats the difference between Electromagnetism and Electro magnetic induction?
thx
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1992 on: May 26, 2010, 03:42:13 pm »
Quote from: Ari Ben Canaan on May 26, 2010, 03:32:52 pm
A@di. From 2009 onwards the first question is ALWAYS experimental. They ask us to plan some experiment.


Can you list all the COMMON IGCSE Physics Experiments we should know....

Much appreciated man ! ;)

Its difficult to tell, could be.

1) Find the specific heat capacity of a substance with few details given

2) Use micrometer/vernial caliper to find the thickness of something

3) Ray experiments involving prism/glass block and pins

4) Pendulum experiments.

5) Calculating the speed of sound (Gun fire/stop watch)

6) Usage of gates to operate firealarm etc. (Diagrams and details)

7) Electrical experiments involving voltmeters and ammeters , find the resistance in parallel and series etc.

8) Usage of ticker-tape timer to calculate the acceleration of objects.

9) CRO displaying a graph, and questions asked about the y-gain, and changing the brightness or the time-base control.

10) Hooke's law experiment.

Good luck
« Last Edit: May 26, 2010, 03:53:13 pm by A@di »
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Offline WARRIOR

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1993 on: May 26, 2010, 03:43:49 pm »
Quote from: A@di on May 26, 2010, 03:42:13 pm
Its difficult to tell, could be.

1) Find the specific heat capacity of a substance with few details given

2) Use micrometer/vernial caliper to find the thickness of something

3) Ray experiments involving prism/glass block and pins

4) Pendulum experiments.

5) Calculating the speed of sound (Gun fire/stop watch)

6) Usage of gates to operate firealarm etc. (Diagrams and details)



yo adi

i think i lost 5 marks in total p6 and p1

any chances of an A*?
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1994 on: May 26, 2010, 03:44:31 pm »
Quote from: Kimo Jesus on May 26, 2010, 03:43:49 pm
yo adi

i think i lost 5 marks in total p6 and p1

any chances of an A*?

Don't lose more than 5 marks in paper 3. A* surely.
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