Author Topic: PLEASE HELPME ON THIS FURTHER MATHS QUESTION(MECHANICS)  (Read 722 times)

Offline sahrhp

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PLEASE HELPME ON THIS FURTHER MATHS QUESTION(MECHANICS)
« on: April 16, 2010, 06:15:00 am »
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.

Offline astarmathsandphysics

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Re: PLEASE HELPME ON THIS FURTHER MATHS QUESTION(MECHANICS)
« Reply #1 on: April 16, 2010, 06:57:12 am »
When I get home

Offline astarmathsandphysics

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Re: PLEASE HELPME ON THIS FURTHER MATHS QUESTION(MECHANICS)
« Reply #2 on: April 16, 2010, 02:31:57 pm »
w=sqrt((eusin %theta)^2 +(eucos %theta)^2) =eu

Offline astarmathsandphysics

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Offline sahrhp

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Re: PLEASE HELPME ON THIS FURTHER MATHS QUESTION(MECHANICS)
« Reply #4 on: April 16, 2010, 03:26:41 pm »
hey thanks A LOT astar
i got it as soon as i saw the diagram you made.

thanks again