Physics: Post your doubts here!

[Rahi Khan]

Re: Physics Help here! Stuck somewhere?? Ask here!

In case you haven't noticed, the motion of plank is also simple harmonic.
So period is proportional to mass. mass decreases period decreases.
amplitude increases because pull has decreased.

problem in A2 Physics 2013 p-52
question- 1
pllease help me out

 

[DeadlYxDemon]

Heelllooo??? -_- Anyone out there who may have the link to the Online scanned AS & A Levels PHYSICS Textbook
Cambridge International AS Level and A Level Physics Coursebook
Please....

 

[arvin vinz]

Hello guys,
I need help for A level physics paper5 (9702_w11_qp_51) http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w11_qp_51.pdf
I have attempt all question and am stuck on question C (iv) and D (i),(ii) i have look up for the answer on the markscheme but i do not understand how to calculate it..
can anyone can help me with it
Thanks

 

[Rahi Khan]

Hello guys,
I need help for A level physics paper5 (9702_w11_qp_51) http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w11_qp_51.pdf
I have attempt all question and am stuck on question C (iv) and D (i),(ii) i have look up for the answer on the markscheme but i do not understand how to calculate it..
can anyone can help me with it
Thanks

stuck in same position. Can't understand the mark scheme >.<

 

[arvin vinz]

Thanks dude

 

[Adiizz]

Aslm,
question 16,26,28 and 29.. i need explanation!

 

[papajohn]

explanations ate available at http://physics-ref.blogspot.com/2014/05/physics-9702-notes-worked-solutions-for.html
(below the links for the worked solutions)

+ arvin vinz it would be better that you don't link to papers when commenting there. That's why your comment was not published

Great work dude..

 

[Anna Marie]

papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w03_qp_1.pdf
please help with question 35!

 

[Biocalife]

Salaam , Could someone provide me with solved physics paper 1 questions from june 2011 to nov 2013 please ? Thanks you in advance

 

[Anna Marie]

opp

Anna Marie check the comment at
http://physics-ref.blogspot.com/2014/05/physics-9702-notes-worked-solutions-for.html

Hope it helped

Oppps Sorry! I meant winter 2002! I accidentally attached the link for Winter 2003! SORRY
So yeah....question 35..........and its nt there in the blog...but Thanks for the link!
papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w02_qp_1.pdf

 

[david1210]

Need Help here..
Paper 12 June 2012 No.6 , 8 , 12 , 13 , 14 , 15 , 18 , 24 , 25 , 26 , 30 , 33 , 35 , 37 , 39

 

[adars.nepal]

guyz a little bit help here.... dynamics motion explained.

when a golfer hits a ball his club is in contract with the ball for about 0.0005 s and the ball leaves the club with a speed of 70 m/s. the mass of the ball is 46 g.

how to determine the mean accleration on this one?

 

[Thought blocker]

fantastic girl has a doubt in 9702_s13_qp_13 Q32 Physicist help her.

 

[fantastic girl]

fantastic girl Thought blocker
I've added the explanations (currently at the end of the post) at
http://physics-ref.blogspot.com/2014/05/physics-9702-notes-worked-solutions-for.html

Explanation is a bit long but I tried to explain why the others are wrong and why one is correct

Thank you soo much bro

fantastic girl has a doubt in 9702_s13_qp_13 Q32 Physicist help her.

Thanks buddy

 

[Jinhang]

S(07) Q18, 23, 27, 37, 40 http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s07_qp_1.pdf
Thanks for your help

 

[XRDXRD]

Hi i am new to this forum.

I have doubt in the following questions.

Can you please explain to me the reason for the chosen answer.

9702/12/M/J/11

Q7,9,10,31,34

Thank you

 

[Thought blocker]

7)
Its D read your book properly, its mentioned
9)
For projectile motion, the vertical acceleration is the same throughout and is equal to g. There is no component of acceleration in the horizontal direction, so horizontal velocity is unchanged. But vertical speed changes due to which the resultant velocity changes.
10)
This is given in book as well Force is the rate of change of momentum
31)
Its D, same book dekho
34)

 

[adarsha]

before going on, you should check if you have included all information and if question is typed correctly

Solution:
Force, F is equal to rate of change of momentum. (F = Δp / t)

Force is also equal to ma and momentum is given by p = mv (assuming the ball is at rest initially)

So, ma = mv / t giving a = v / t = 70 / 0.0005 = 140 000

but this answer is not realistic. you should check the question again

By the way, you should also try to visit the link in my signature, it should help

the question is same and that's all the information that is given to me, but i was able to find the answer when i used "velocity * weight * 2" . is it anyway possible that the formula used would be correct?? thanks i will check your blog.

 

[arvin vinz]

hello..i need some help here..refer to the question my answer is 12Ω and the answer in the book is 18Ω. here is the formula i have use (30V-10V)=(0.5*20)+(0.2*10)+(0.2*10)+(0.5*R) My answer is R=12Ω

 

[arvin vinz]

arvin vinz
the explanation is available at http://physics-ref.blogspot.com/2014/05/physics-9702-notes-worked-solutions-for.html

Answer is indeed 18

Thanks buddy..but i still don't get it..why the current 0.2A also flows through the 20Ω resistor??