AS phy p22 , how was it?

[m.r92]

o hellow, freq 500Hz for sure hae,

hahahahah we didnt see that lolxx

nope, but i rest my case lol

 

[m.r92]

paper was easy, but the problem was insufficient time

 

[toirneach07]

ikr!!
i probably left arnd 6 marks 4 sure!!

 

[AppleGreen]

wavelength = distance between node x 2, it wasn't a full wave diagram, the x axis was the equilibrium position. i tripled checked!

http://www.xtremepapers.com/community/threads/how-was-physics-paper-2-as.17028/page-6

 

[gamer_boy]

ikr!!
i probably left arnd 6 marks 4 sure!!

same here

 

[toirneach07]

same here

haha!!
did u do tht ball graph nywy??
Didnt gt it at all!!!!

 

[gamer_boy]

haha!!
did u do tht ball graph nywy??
Didnt gt it at all!!!!

lolx i drew it lil bit wrong, will score half marks in it, and calculated wrong change in kinetic energy, it was purely a silly mistake...

 

[toirneach07]

lolx i drew it lil bit wrong, will score half marks in it, and calculated wrong change in kinetic energy, it was purely a silly mistake...

For the K.E., v just had 2 find K.E b4 (v1 = 8.4 sth).... n K.E. aftr (v2 = 4. sth)
n subtract the 2 right??

 

[AppleGreen]

For the K.E., v just had 2 find K.E b4 (v1 = 8.4 sth).... n K.E. aftr (v2 = 4. sth)
n subtract the 2 right??

final KE is 0 dude

 

[toirneach07]

final KE is 0 dude

I didnt gt tht ques, dudette!!
so, how did u find d final KE??

 

[AppleGreen]

since that ball is at max h at that moment, when PE is max, KE=0

 

[toirneach07]

Did that mean the final KE as in whn d ball stopped???
Bt thts obvious, hw can it mean tht??

 

[gamer_boy]

I didnt gt tht ques, dudette!!
so, how did u find d final KE??

ya final KE was zero, i took it frm speed 4.2 , my bad..

 

[toirneach07]

Oh!!
n initial KE??
wht velocity did u tk 4 tht??

 

[gamer_boy]

Oh!!
n initial KE??
wht velocity did u tk 4 tht??

nope initial wid 8.2 ,

 

[AppleGreen]

nope initial wid 8.2 ,

yeap

 

[AppleGreen]

Did that mean the final KE as in whn d ball stopped???
Bt thts obvious, hw can it mean tht??

the question ask for KE change when ball at B

 

[Knight]

Oh!!
n initial KE??
wht velocity did u tk 4 tht??

i think they asked for the change on K.E and for that we had to use the finial speed before impact i.e 13.......

 

[AppleGreen]

i think they asked for the change on K.E and for that we had to use the finial speed before impact i.e 13.......

they ask for change in ke from A to B.At A, u=8.2, at B, v= 0

 

[gamer_boy]

i think they asked for the change on K.E and for that we had to use the finial speed before impact i.e 13.......

nope they asked , the change when it passed thru A till B ,, at A velocity was 8.2