Physics: Post your doubts here!

[queen of the legend]

can any1 explain qs5 and qs6c to me.
S09: http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_qp_2.pdf

which variant do you mean and please post the mark scheme along !

 

[queen of the legend]

anyone gonna help......plzzzzzzzzzzzz

post your question please!

 

[queen of the legend]

hi.can anyone solve m/j/10/21 q 2(b)ii?
Thanks.

draw tangent to the curve at 0.4s and find out the gradient that is equal to speed.

 

[xyz!]

guys m posting dis fr the 2nd tym..sum1 pls help..
dis is a doubt regarding paper 5
here's the link..
http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_w11_qp_51.pdf
can sum1 pls draw the diagram(a labelled one pls) fr the first question and attach it..?? i read the ms but m not able to undrstnd!

 

[queen of the legend]

Can someone Please Please Please answer my Question's (it got ignored 3 times)

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_23.pdf
7bii) I don't get why charged particle is not an isolated system

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_13.pdf
29) I just don't understand the question, I looked at examiners report and it said that the lines R to S has a constant phase difference


I will thank you a lot

for question 7bii : its very easy . if you were able to solve 7 part a then part b is just continuation. ok we know that change in momentum (delta)P= F x (delta) t
so just substitute part a ii for delta P .
you already got F= Eq , and t= L/v ...........so , (delta P = F.t )
that is P= EqL/v as simple as that !

for question 29 ; interference pattern is observed on the viewing screen which if you think more about the diagram is XY. so answer is C !! you dnt need to calculate or think about phase relationship !

 

[bamteck]

anyone having a doubt in paper 2 for AS can contact me but plss post the question paper and mark scheme along!

What about P4 ?

 

[champ-student]

post your question please!

HOW TO FIND VECTORZZZZ???????????????????

 

[Kirabo Takirambudde]

Sorry, but what is the likelihood of a question being repeated in O/N this year that appeared in either may/june of this year or in either both sessions last year?

 

[champ-student]

how to find vectorzzzzzzzzzzzzz?????????

 

[Muhammad Talha]

Use displacement/time at each of the times 20,40,60,80,100 keep in mind that after 50s velocity is negative. Plot values of velocity, draw your graph. Done

Thank you so much...

 

[geek101]

qp: http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s09_qp_2.pdf

ms: http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s09_ms_2.pdf

question 2, how do you find the ke after for ball B, isnt the speed of separation 0.8, then why in the world does the ms say 2.4 ? feeling like an air head!

THANKS!

 

[queen of the legend]

qp: http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_qp_2.pdf

ms: http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_ms_2.pdf

question 2, how do you find the ke after for ball B, isnt the speed of separation 0.8, then why in the world does the ms say 2.4 ? feeling like an air head!

THANKS!

speed of separation is actually difference in velocities of ball S and B . velocity of B = -0.8 , and Velocity of S= 1.6
so, 1.6 - (-0.8) = 2.4

 

[queen of the legend]

how to find vectorzzzzzzzzzzzzz?????????

be specific please! if you have a question you dont understand post it down

 

[geek101]

speed of separation is actually difference in velocities of ball S and B . velocity of B = -0.8 , and Velocity of S= 1.6
so, 1.6 - (-0.8) = 2.4

uhum why?

 

[Minato112]

how to find vectorzzzzzzzzzzzzz?????????

By vectors u mean vector diagrams?

 

[champ-student]

I know noting bout vectors.......
i know only a couple of formulae: Fx=F cos theta , Fy=F sin theta
need help

 

[champ-student]

i need help in this question plzzz
forces of 12 N and 5N act on same point but their direction can be varied.
what is their
a) greatest possible resultant
b)least possible resultant
(i know about greatest but not how to do part b)

 

[Minato112]

I know noting bout vectors.......
i know only a couple of formulae: Fx=F cos theta , Fy=F sin theta
need help

Check this : http://www.s-cool.co.uk/a-level/phy...evise-it/vectors-and-scalars-whats-the-differ
When u reach down the page, click next.

Hope it helps

 

[champ-student]

Check this : http://www.s-cool.co.uk/a-level/phy...evise-it/vectors-and-scalars-whats-the-differ
When u reach down the page, click next.

Hope it helps

thanx a lot.................

 

[champ-student]

Find the force on the car parallel to the slope:

The 2000 N force is already parallel to the slope so we can ignore it for a moment.
The 10 000 N is at an angle of 60 degrees to the slope so we need to use trigonometry to find its component parallel to the slope (look at the small triangle carefully):
Component parallel to the slope = 10 000 cos 60° = 5 000 N down the slope.
Now we can simply subtract the 2 000 N from the 5 000 N force as they are in opposite directions.
So the resultant force parallel to the slope = 5 000 - 2 000 = 3 000 N down the slope.
Now it's your turn!