Qualification > Math

m1 edexcel!

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Khey [Rainbow]:
lol

zic2009:
isnt the last ans of the paper 0.42sec??????
is there anything wrong with the marking scheme?

zic2009:
i did everything right, just that i got 0.42 instead of 0.566s in the last ans of the paper. my working and everything is right.
how much will i lose for only the wrong value?

zic2009:
i still have a feeling i am right because, i'll show you the working:
s=1.175 u=0.7 a=9.8 t=? v=?
if we calculate v first
then
v^2=u^2+ 2as

      =0.49 + [2*9.8*1.175]
      = 23.52
therefore v=4.849742261 ~ 4.85

now using v=u+at
t= (v-u)/a
=(4.85-0.7)/ 9.8
=0.423223087 ~0.42s

am i right????


   

Igcseboy:

--- Quote from: zic2009 on May 26, 2010, 08:41:48 am ---i still have a feeling i am right because, i'll show you the working:
s=1.175 u=0.7 a=9.8 t=? v=?
if we calculate v first
then
v^2=u^2+ 2as

      =0.49 + [2*9.8*1.175]
      = 23.52
therefore v=4.849742261 ~ 4.85

now using v=u+at
t= (v-u)/a
=(4.85-0.7)/ 9.8
=0.423223087 ~0.42s

am i right????


   

--- End quote ---

i also got 0.42 with a similar method :S:S

and i was very confident abt it ::S:S:S

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