What is the magnitude of your total displacement if you have traveled due west with a speed of 23 m/s for 125 s , then due south at 12 m/s for 255 s ?

Question

Express your answer using two significant figures.
What is the direction of your total displacement in part A.

Answer 1

magnitude? Easy, they are at right triangles.

magnitude=sqrt(23*125)^2 + (12*255)^2 )

angle W of S is arctan((W/S) or
arctan ((23*125)^2/(12*255)^2 )