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http://img15.imageshack.us/img15/858/masteringf.jpg [Broken]

my attempt,

[tex]\alpha[/tex]= dw/dt

550-150 = 400 rev/min change

400/3.5 = 114 revs

that wasn't right so i tried

114*60, which gives -6857 revs^-2

can someone help please? i'm not sure if i've got this whole revolution thing correct in my head lol

my attempt,

[tex]\alpha[/tex]= dw/dt

550-150 = 400 rev/min change

400/3.5 = 114 revs

that wasn't right so i tried

114*60, which gives -6857 revs^-2

can someone help please? i'm not sure if i've got this whole revolution thing correct in my head lol

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