Physics: Post your doubts here!

[fjmskt]

Well, we are never sure of what is going to come. -.-
So it's better to practice than..

 

[Muhammad TAimoor]

Well, we are never sure of what is going to come. -.-
So it's better to practice than..

As you wish

 

[Muhammad TAimoor]

Well, we are never sure of what is going to come. -.-
So it's better to practice than..

As you wish

 

[fjmskt]

Sure thing.

 

[Musab100]

Make the point P, the pivot. That means, Rope A has zero force. Now apply sum of anti-moments = Sum of clock-moments. You'll get the Rope B force.
Use it further through the same formula to find Tension in Rope A.

Thankxx man !!

 

[Hassan22]

wave straight kasy banti ha?

 

[Muhammad TAimoor]

wave straight kasy banti ha?

Straight wave is the property of Stationary Waves. At time= 0, the stationary seems like an ordinary transverse wave. At time= 1/4thT, it becomes straight. Then at 1/2T, its transverse in the reverse direction and then, at 3/2T, its straight again and so on.

 

[7865]

Does anyone have the May june 2013 mark scheme variant 21?

 

[NidaChaudhary]

Does anyone have the May june 2013 mark scheme variant 21?

http://olevel.sourceforge.net/papers/9702/9702_s13_ms_21.pdf

 

[student013]

Can someone who've gone through numerous Physics Paper 5, can post papers where he/she've encountered the most difficulty!! Waiting, this gonna help between>>

 

[salvatore]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s06_qp_4.pdf

Could someone please help me with the whole of qn 8 of this paper? I'll really appreciate it

Thanks

I'm re-posting this.. anyone??

 

[WYuMon]

Anyone help me withJune2012 paper 42 Question 5.C

 

[forever_chocoholic]

please someone help me with these 2 questions...... why is 6c?? in May/june 2008 Paper 1
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_qp_1.pdf
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_ms_1.pdf

and why is 8d and not c??? in May/June 2012 Paper 1
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_12.pdf
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_ms_12.pdf
I hope we all do well in our exams this year ....InshAllah
Please reply asap!!!

 

[sasuke474]

Can someone help me learn the kinematics equations? They won't stay in my head no matter what

 

[WYuMon]

please someone help me with these 2 questions...... why is 6c?? in May/june 2008 Paper 1
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_qp_1.pdf
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_ms_1.pdf

and why is 8d and not c??? in May/June 2012 Paper 1
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_12.pdf
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_ms_12.pdf
I hope we all do well in our exams this year ....InshAllah
Please reply asap!!!

Ok your 1st question
Acceleration is a vector which has magnitude and DIRECTION
Think of a Car driving round a roundabout
The direction of the car is changing constantly round the roundabout. Therefore it is accelerating even though Velocity remain unchanged/constant when the car is round the roundabout
You can say an object is accelerating if the direction is cjanging and velocity remain constant or vise versa AND or both is changing

 

[naoomi]

Can anyone please answer these questions from the paper june 2012/ variant 13

ques 5 (why isn't B correct)
ques 12(why isn't A correct? coz for elastic collision the bodies stick together after impact)
ques 19
ques 24
ques 31
ques 35
ques 38

 

[WYuMon]

For question 5
Because inverse graph will never ever touch the axis
And the question says I varies inversely to square of d
I answer the rest later

 

[6Astarstudent]

Anyone help me withJune2012 paper 42 Question 5.C

its an AC current with 5.6A RMS current.
we know that a DC current of 5.6A causes 2.4g increase on the balance
to find the maximum AC current we multiply 5.6 x root 2
and the force (or mass) caused is proportional to the current (F = BIL) so the maximum mass will be 2.4 x root 2 = 3.4g
and AC fluctuates from minimum back to maximum so varies from -3.4 -> 3.4g

 

[WYuMon]

its an AC current with 5.6A RMS current.
we know that a DC current of 5.6A causes 2.4g increase on the balance
to find the maximum AC current we multiply 5.6 x root 2
and the force (or mass) caused is proportional to the current (F = BIL) so the maximum mass will be 2.4 x root 2 = 3.4g
and AC fluctuates from minimum back to maximum so varies from -3.4 -> 3.4g

Thanks! My friend explained to me already, no one bother replyy question for almost 2days

 

[WYuMon]

For question 12
Bodies do NOT stick together after an elastic collision, they will bounce off each other
Only in inelastic collision they will stick