9.
A displacement vector (in meters), \(D_1 = -9i + 7j\), represents the motion of a particle on
a 2-dimensional map. If that displacement is followed up by a second displacement, \(D_2\
\(= 5i - 3j\), what is the magnitude of the net displacement for that particle?
A. 5.6 m
B. 10.4 m
C. 2.7 m
D. 3.9 m
10.
For the vectors given in question #9, find the angle of the net displacement.
A. 120°
B. 115°
C. 135°
D. 45°