
John M. answered 04/15/21
Tutor
4.7
(380)
Math Teacher/Tutor/Engineer - Your Home, Library, MainStreet or Online
m= -10i+10j
|m| = √[ (-10)2 + (10)2] = √200 =10√2
Its direction would be ArcTan(10/-10) = ArcTan(-1) = -45°