How I can solve this problem please?
* an aircraft hens north with an aircraft speed of (Va) , the wind direction is east with speed (Vw)what is the true motion of the aircraft?

Thanks,

Have a drawing.

Attachment 26503

I guess you mean the wind it towards the East.

Find the resultant using Pythagoras' Theorem

I hope it helped! :)

thanks I got it in analytical mechanic's book.
V(true)=Va+Vw
V(true)=i Va + j Vw.

thanks.