Qualification > Sciences
ALL CIE PHYSICS DOUBTS HERE !!!
missbeautiful789:
We know that point X is a minmum point,
so thats suggests that the phase difference of the two waves at that point is 180 degrees, which is the same as half wavelength
so path difference=0.5 lamda
path difference = distance S2 - distance S 1 = 0.5 lamda
so ans is C
you need to understand that at ponit X. 1 wave is at its max and 1 is at its min to make a resulting displacement of zero.
that happens at a phase diff of 180 degrees, assuming that the both have same amplitude.
you might have said ans is D, but that is only correct if it is a maxima
TJ-56:
thanx alot for the answer
the answers A
Can you please explain
missbeautiful789:
--- Quote from: $!$RatJumper$!$ on October 22, 2010, 03:51:18 pm ---This should answer your question. If it isn't clear let me know :)
http://i53.tinypic.com/jawhgp.jpg
--- End quote ---
You made a mistake RatJumper. T1 seconds after the ball is released the ball travels a distance of x, so you cant go and say that u=0 for the journey between time interval between T2 and T1, because it would have picked up speed when it reached point M1
This is how i did it:
<a href="http://tinypic.com?ref=zxtfzm" target="_blank"><img src="http://i54.tinypic.com/zxtfzm.jpg" border="0" alt="Image and video hosting by TinyPic">[/url]
Distance to cover h given by area of trapesium
Distance=(1/2)(a+b)(h)
h=(1/2)(aT1+aT2)(T2-T1)
h=(1/2)a(T1+T2)(T2-T1) difference of squares so>>
h=(1/2)a(T12-T22)
2h/(T12-T22)=a
$!$RatJumper$!$:
Thats right. Sorry about that guys.. my bad :)
TJ-56:
--- Quote from: TJ-56 on October 23, 2010, 06:36:44 pm ---thanx alot for the answer
the answers A
Can you please explain
--- End quote ---
can anyone help me with this ?
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