HOW WAS PHYSICS PAPER 2 AS!!!!!!!!!!!

[WhereAmazingHappens]

initial u= 8.2 and v= 0 so KE= 1.76

i wrote 1.76 and not 1.8 will i get penalized?

 

[WhereAmazingHappens]

Guys for the Young Modulus question can anyone remember the axes on the graph?

 

[fathimaash]

Guys for the Young Modulus question can anyone remember the axes on the graph?

x- extension
y- force

 

[AdeelRox]

x- extension
y- force

dude its strain on the y axis and stress on the x-axis

 

[WhereAmazingHappens]

x- extension
y- force

are you sure?

 

[WhereAmazingHappens]

dude its strain on the y axis and stress on the x-axis

it was not strain against stress

 

[ghlamo]

so that

well y axis had intensity. wen intensity is 0 the ball is at a node dat is zero amplitude. so distance between two nodes was .68m

means lamba is equal to .68 into 2 so ans is not 500

 

[WhereAmazingHappens]

so that

means lamba is equal to .68 into 2 so ans is not 500

when lambda is equal to .68 frequency is 500 for gods sake cant u do a simple calculation?????
340 = 0.68*f
f=500Hz

 

[WhereAmazingHappens]

That Young's Modulus question is a tricky piece of goods

 

[rogue94]

For the force-extension graph of Copper, it was below steel right? A straight line passing through origin, but what was the end point, i mean what was the force at .25 mm extension?? was it .65 N or 1.5 N?

 

[WhereAmazingHappens]

For the force-extension graph of Copper, it was below steel right? A straight line passing through origin, but what was the end point, i mean what was the force at .25 mm extension?? was it .65 N or 1.5 N?

thats exactly the question, it depends on the axes

 

[rogue94]

thats exactly the question, it depends on the axes

axes was definitely force on y axis and extension on x axis, still confused about the end point.

 

[rogue94]

What about the last question of the paper, why is mass not conserved?

 

[BILALrox01]

so that

means lamba is equal to .68 into 2 so ans is not 500

distance between two nodes IS lambda not lamba into 2

 

[BILALrox01]

What about the last question of the paper, why is mass not conserved?

mass-energy is conserved not mass. mass is converted to energy acrdng to E=mc square

 

[gary221]

distance between two nodes IS lambda not lamba into 2

no its lambda/2

 

[BILALrox01]

no its lambda/2

yeah sorry 0.68m was the distance between 3 nodes hence lambda nd so 500hz

 

[Taimoor93]

Can anyone plz explain the method to find K.E and P.E

the final KE was 0 so change in KE was the initial KE...(0.5)(o.o5)(8.4)^2=1.76J........for PE change... h must be calculated.... apply s=ut + (1/2)(a)(t)^2.... s=h... a=-9.81.. u=4.2(given).... t can be calculated bu v=u + at.....0=4.2+(-9.81)(t)..... subtract final PE from initial PE u get 2.0J... i think i got this right.........

 

[Ahmed Tariq]

distance between two nodes IS lambda not lamba into 2

LOL. I would suggest you to revise your concepts before arguing.

 

[abdullahsatar]

People, If I get the value for C wrong..does ecf apply to the uncertainty part?