Physics: Post your doubts here!

[Wolfgangs]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w09_qp_11.pdf
14

 

[maq1996]

worst paper ever

 

[kitkat <3 :P]

worst paper ever

agreed

 

[maq1996]

im just so disappointed.. dont think id be getting more than 23

 

[sagar65265]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w09_qp_11.pdf
14

This is from a post that is two pages back, iin case you have any more doubts from this paper, you may find the answers there and on the page after that (p. 578 and p. 579):

Q14) When the projectile reaches it's highest point, it has a purely horizontal velocity and no vertical component of velocity.
Additionally, since there is no force on the projectile in the horizontal direction, it has the same horizontal velocity at it's highest point as it did when it was shot.

A little more on this - suppose the initial velocity has a magnitude of "v", the initial kinetic energy E = 1/2 * m * v² = 0.5mv².

Now, onto the focus of the question: since the initial velocity points at an angle 45° to the horizontal, the component of velocity in the horizontal direction should be

v(horizontal) = v * cos(45) = v/(√2)

This is, by our discussion above, the velocity of the projectile at it's maximum height. So, the kinetic energy at it's greatest height is

E(f) = (1/2) * m * (v/(√2))² = 0.5m * v²/2 = 0.25mv².

Let's divide E(f) by E, giving us

E(f)/E = (0.25mv²)/(0.5mv²) = 1/2
Therefore, E(f) = (1/2)E = 0.5E = A.

Good Luck for all your papers!

 

[Student12]

It was difficult

 

[danial 234]

Time wasnt sufficient... made some random guesses ... overall it was fine.. neither very good.. nor very bad

 

[Wolfgangs]

Were there some repeated questions from pastpapers? At least 25%? Please mention it in terms of percent XP

 

[26697luj]

what varient did you do?

 

[26697luj]

guys just the varient its not like i am asking for the questions!

 

[maq1996]

what would the threshhold be around?

 

[..sacrifice4Revenge..]

what would the threshhold be around?

https://www.xtremepapers.com/community/threads/physics-12-gt.34503/#post-829148

 

[Rockstar RK]

Bro, I am an external student in my school.Today when I was solving the question paper, the Exam Officer and Supervisor repeatedly were disturbing me by sliding the OMR sheet between my vision and at times in between my pen's tip. This happened 5 to 6 times which caused loss of time. So what should I do to revert this act by the authorities.

 

[Anonymous981]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_11.pdf
Q8

 

[Wolfgangs]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_13.pdf
q35 please

 

[Thought blocker]

Heya guys! My paper was great...... but I won't get above 35
Shits
I wanna screw myself................... TIME ZYADA Q NI DETE ????????????????
I knew answers but TIME!!! HELL WITH YOU . _ .

 

[Wolfgangs]

Heya guys! My paper was great...... but I won't get above 35
Shits
I wanna screw myself................... TIME ZYADA Q NI DETE ????????????????
I knew answers but TIME!!! HELL WITH YOU . _ .

Sample 11 or 12? I hope the paper will be easier for sample 11. Anyway, I know you'll get a good grade overrall, you seemed to be skilled in Physics

 

[Thought blocker]

Sample 11 or 12? I hope the paper will be easier for sample 11. Anyway, I know you'll get a good grade overrall, you seemed to be skilled in Physics

12 Hope my guesses in 5 questions are correct........

 

[TheJDOG]

Damn, just did Paper 12 and there were few questions repeated, I'm gonna honestly say this paper wasn't smooth with me :/ It wasn't easy and wasn't hard.
Anyways, good luck all!

 

[_Ahmad]

HELP!!!!!!!!!

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_11.pdf

Q24,37