An object moves 20 m east in 30 s and then returns to its starting point taking an additional 50 s. If west is chosen as the positive direction, what is the sign associated with the average velocity of the object?
A) "+"
B) "-"
C) "0 (no sign)"
D) "any of the above"

Question

Quizplus · Accepted Answer

The average velocity is the total displacement divided by the total time. Since the object returns to its starting point, the total displacement is zero, resulting in an average velocity of zero, which has no sign.

An Object Moves 20 M East in 30 S and Then