Physics: Post your doubts here!

[princess Anu]

Oh I thought you were telling me!

lol i wanted to confirm first

 

[princess Anu]

 

[princess Anu]

qu 3 at http://physics-ref.blogspot.com/2014/10/9702-june-2014-paper-21-worked.html

I don't understand your explanation for the first part
help !

 

[princess Anu]

Why is C wrong for this

 

[princess Anu]

I know that but isn't it that distance is inversely proportional to force acting so why won't the distance of the Weight from pivot etc make any difference?

there is equilibrium. so resultant force is always zero. upwards forces = downward forces

 

[Izzie98]

I want help with..phys practical paper...i don't have a clue...

 

[ashcull14]

why is upthrust having the least magnitude ? as W= upthrust + air resistance so weight has the greatest magnitude ....but y is upthrust lesser than air resistance?

 

[ashcull14]

 

[M.A. Chowhan]

why is upthrust having the least magnitude ? as W= upthrust + air resistance so weight has the greatest magnitude ....but y is upthrust lesser than air resistance?

The magnitude of upthrust acting on an object is equal to the weight of the fluid displaced by the object.
The fluid may be liquid or gas.
If it is air, then upthrust is very small, because the weight of the air displaced by the object is very small.

 

[Serial_Ripper]

-just realized the book covers I posted weren't even visible-
Can anyone upload Cambridge's International As and A level Revision Guide for Physics?????

 

[M.A. Chowhan]

-just realized the book covers I posted weren't even visible-
Can anyone upload Cambridge's International As and A level Revision Guide for Physics?????

You might find this one helpful.

 

[princess Anu]

Can somebody please explain me these? Pleaseeeee
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_12.pdf Q9 Why is A wrong? and Q 10 too if possible

 

[M.A. Chowhan]

exploded diper
Please Explain me the graph of q2 part c
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_23.pdf

here is the solution with explanation

 

[M.A. Chowhan]

Please anyone help me with the graph
Please Explain me the graph of q2 part c
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_23.pdf

here is the solution with explanation

 

[M.A. Chowhan]

View attachment 49715

here is the solution with explanation

 

[M.A. Chowhan]

Can somebody please explain me these? Pleaseeeee
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_12.pdf Q9 Why is A wrong? and Q 10 too if possible

For your first question, read section 2.2 (uncertainties in the readings and measurements) in the attached notes.

 

[Serial_Ripper]

You might find this one helpful.

thnx

 

[princess Anu]

nov 2012 p12 questions are explained at
http://physics-ref.blogspot.com/2014/08/9702-november-2012-paper-12-worked.html[/QUOTE

View attachment 49691

this tooo

 

[ashcull14]

The magnitude of upthrust acting on an object is equal to the weight of the fluid displaced by the object.
The fluid may be liquid or gas.
If it is air, then upthrust is very small, because the weight of the air displaced by the object is very small.

thnk u so much

 

[ashcull14]

umm

here is the solution with explanation

.sorry . theres no attachment..cn u repost it plx?