Velma bicycles northward at an unchanging speed of 4 m/s, and Mort jogs southward at an unchanging speed of 4 m/s. Mort's velocity relative to Velma is
A) 8 m/s northward.
B) 4 m/s northward.
C) 8 m/s southward.
D) 4 m/s southward.
E) zero.

Question

Quizplus · Accepted Answer

The relative velocity of Mort with respect to Velma is the sum of their speeds because they are moving in opposite directions. Thus, it is 4 m/s + 4 m/s = 8 m/s southward.

Velma Bicycles Northward at an Unchanging Speed of 4 M/s