Physics: Post your doubts here!

[Thought blocker]

i gu

ess he had already

Hm

 

[hamzashariq]

Please q16 How is D is correct when the sum of forces anti clockwise & clockwise are not equal. Oh i dont understand please anyone explain me.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_13.pdf

For zero resultant force upward and downward forces must be zero and in D 42 + 70 = 112N
For zero resultant torque sum of clockwise moments must be equal to sum of anticlockwise moments
42*50 = 30*70 = 2100Ncm

 

[JackAaron]

Assalamualaikum I jst wnt to ask. Do you guys have notes for A2(application) other than direct sensing. If you hv remote sensing n communicating information notes..pls let me know. Syukran

 

[Wolfgangs]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_13.pdf
q18

 

[_Ahmad]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_13.pdf
q18

v^2=u^2+2gs
g=-9.81 (since car is moving upwards and gravity act downwards)

v^2=28^2+(2*(-9.81)*22)
v^2=352.36
v=18.77= 19 ms^-1

so answer is B

 

[Ahmed H. Al-Neel]

I had already uploaded this paper . _ .
w12_qp_13
35)

Here where ever you see the junctions, the current divides, Try all the options and check on which two of the ammeter has same currents passing.
So in D option, only one loop is formed so every where in the circuit the current would be same. Hence D.

i didnt really understand .. why not B for example? B has only one loop

 

[Ahmed H. Al-Neel]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_13.pdf
questions 19,34 and 35 please

 

[Wolfgangs]

Can someone explain q35.

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_13.pdf

 

[Hadi Murtaza]

Can someone explain q35.

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_13.pdf

If der r 2 or more wires protruding from a single point, then da current is split. When current is split, da value of current is not da same everywhere in da circuit. Da only circuit arrangement, where dis is not da case is arrangement D. In D, a single wire is connecting every meter, so current is same throughout circuit

 

[Batguy]

kitkat <3 :P

 

[kitkat <3 :P]

kitkat <3 :P

B?

 

[Hadi Murtaza]

kitkat <3 :P

m(60) + m(-40) = 2mV
60m - 40m = 2mV
2mV = 20m
[ V = +10 cm/s ]
Answer: A

 

[Batguy]

B?

B

 

[Hadi Murtaza]

B

Answer is B ?

 

[kitkat <3 :P]

m(60) + m(-40) = 2mV
60m - 40m = 2mV
2mV = 20m
[ V = +10 cm/s ]
Answer: A

:O i didnt add them i took mv on the right side

 

[Batguy]

m(60) + m(-40) = 2mV
60m - 40m = 2mV
2mV = 20m
[ V = +10 cm/s ]
Answer: A

shoot!! sign ka bheelo jata hoon hamesha :''( *thats the main key point in all mcqs* *sign changes as direction changes* kitkat <3 :P thanx hadi

 

[Hadi Murtaza]

:O i didnt add them i took mv on the right side

thora sa concentrate

 

[Hadi Murtaza]

shoot!! sign ka bheelo jata hoon hamesha :''( *thats the main key point in all mcqs* *sign changes as direction changes* kitkat <3 :P thanx hadi

ur welkum
Answer is A ryt ?

 

[Batguy]

kitkat <3 :P Hadi Murtaza

 

[deepum]