A truck moves 70 m west,then moves 120 m east,and finally moves west again a distance of 90 m.If east is chosen as the positive direction,what is the truck's resultant displacement?
A) 40 m
B) − 40 m
C) 280 m
D) −280 m

Question

Quizplus · Accepted Answer

The truck's resultant displacement is calculated by considering the direction and magnitude of each movement. Moving 70 m west is -70 m, moving 120 m east is +120 m, and moving 90 m west is -90 m. The resultant displacement is -70 + 120 - 90 = -40 m.

A Truck Moves 70 M West,then Moves 120 M East,and