Physics
posted by Stupid Alex .
In an (x,y) coordinates system with x east and y north, an aircraft has the velocity components Vx = 170 ms1 and Vy = 110 ms1, and an acceleration of 6.4 ms2 at an angle od 42 degree from the x axis. What is the angle of the velocity from the x=axis.
And what is the ycomponent of the acceleration?

angle of velocity: what is arc tan(y/x)?
arc tan (170/110)=57.09 degrees, or 57 deg W of N.
y component of acceleration: which way is the angle? up or down? ay=6.4sin(+42); 42 if it is S of x