Qualification > Math

PLEASE HELPME ON THIS FURTHER MATHS QUESTION(MECHANICS)

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sahrhp:
this is a momentum question

i have done it this far
u has two components
let them be
i= u x
j= u y       then (x2 + y2 )1/2 = 1

so w = uxi + e2 uyj

the to calculate the magnetude of w in terms of u

w =  ((ux)2 + (e2 uy)2 )1/2

and i shuffle through this but cannot get the right answer out

plz help me out and tell me where i have gone wrong.

astarmathsandphysics:
When I get home

astarmathsandphysics:
w=sqrt((eusin %theta)^2 +(eucos %theta)^2) =eu

astarmathsandphysics:
http://www.mediafire.com/imageview.php?quickkey=0zllzmyczzw

I tookk a pic on a phone

sahrhp:
hey thanks A LOT astar
i got it as soon as i saw the diagram you made.

thanks again

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