Question

I'm in a Sailing University in Russia and we were given a question which is a math question: I'm mot sure I did it correctly:

A ship is going with speed v to the West. Known that the wind is blowing from south-west. The speed of the wind which is measured on the ship is u0. Find the speed of wind reletivly to Earth.

Answer 1

|vercot^a^|=|vector^v^|*sin45=(|vetor^v^|*sqrt2)/2.
|vector^u0^|^2 - |vector^a^|^2=|vector^b^|^2.
|vector^b^|^2=(|vector^u^|+|vector^v^|*cos45)^2=(|vector^u^|+(|vector^v^|*sqrt2)/2)
|vector^u0^|^2 - |vector^a^|^2=(|vector^u^|+(|vector^v^|*sqrt2)/2)
|vector^u^|+(|vector^v^|*sqrt2)/2=sqrt(vector^u0^|^2 - |vector^a^|^2)=sqrt(u0^2 - (V*sqrt2)/2)

So the answer is \(\LARGE\color{darkgreen}{\text{u=sqrt(u0 - v^2/2) - V/sqrt2.}}\)

Answer 2

Am i Correct?

Answer 3

@rational

Answer 4

@perl

Answer 5

@Preetha

Answer 6

yes

Answer 7

yes

Answer 8

what yes?

Answer 9

@texaschic101

Answer 10

did you meant i'm correct>?

Answer 11

yeah sorry your correct

Answer 12

you sure? cause it is very importaint to me to pass this exam.

Answer 13

well yeah here is the diagamr i made

Answer 14

let me draw it

Answer 15

@perl

Answer 16

yes that is 45

Answer 17

@perl here i finnaly posted my drawing
seems we have different

Answer 18

lol got it.