OMG! Physics p22!!!

[beacon_of_light]

n what about that electricity question..why is the calculated voltage diffferent from the actual one???

 

[wasiqss]

what about the last part of the photograph question?? and in the momentum question did u need to calculate the change in momentum?? and was it 7Ns?

Can u tell me values of V and u, and M of ball ,nd we have to calculate chnage in momentum

 

[ashhadazam]

wt was the instrument to measure the diameter ? i wrote micrometer screw gauge

 

[hamizahmed]

man the paper was hell of a difficult.. I have almost lost 20 marks in it till now.. By no means it was easy :evil:

 

[tricky]

yaa it was micrometer screw gauge

 

[wasiqss]

n what about that electricity question..why is the calculated voltage diffferent from the actual one???

Coz we plotted best fit Line,and best fit line doesnt give u actual values,and question asked for reference from graph

 

[ashhadazam]

change in momentum 7 hi th.. even i did it that way but it isnt correct :S !!! U had to do it by " Initial momentum = final momentum" which was 2Ns

 

[beacon_of_light]

V and u values were nt given but on the graph the initial and final momentum of the two spheres were given.....if i am not mistaken....for sphere A it was 6Ns and for sphere B it was -4Ns...and the final momentum of sphere A was -3...

i too wrote micrometer...

 

[ashhadazam]

uMmm.. I wrote because some of the energy was used up in heating the wire :|

And we took that answer from the bestfit btw!!! :/

 

[laviva]

can anyone confirm what the power reduction percentage is supposed to be?? mine was 8.5% or something...and how much mark was for the total electricity question??? and what were we supposed to write for the last part of both the electricity question and the ball-photograph question??

 

[hamizahmed]

those who are expecting 50-55 got to be kidding

 

[beacon_of_light]

8.5% is right

 

[ashhadazam]

Umm i got the power 8.5percent too.. it is correct.. Many people got this ans !!!

 

[ashhadazam]

those who are expecting 50-55 got to be kidding

Well they arent

 

[beacon_of_light]

and for the last part of photograph i wrote...that as resistance is not negligible...air resistance wuld increase with sped...resultant force wuld decrease and so wuld the acceleration..and hence the new image would be below the initial position....i hope that is right!

 

[gerrard]

haha...they made a easy p4 and took their revenge in p2 and 5 =( F***k you CIE

 

[hamizahmed]

yar my lost marks have reached a total of 20 and everyone is expectin 50-55. WTH

 

[ashhadazam]

I think we had to comment on the foto :S !! I wrote that the image would be clearer as the ball has air resistance acting on it and it has a slower motion

 

[beacon_of_light]

wasnt it the position of the photograph...

 

[ashhadazam]

yar my lost marks have reached a total of 20 and everyone is expectin 50-55. WTH

Only a few expecting them.I pray the buondaries go low !!!! because on the whole people dint do it rly gooD !!