Question

A dog walks 140 m due east and then turns west and runs 65 m. He then turns north and trots 40 m. After completing his journey. Then he hears his master's call, he runs directly home. Calculate total distance covered and total displacement of the dog before his master called.

Answer 1

$OA=140mAB=65mBC=40mOB=140-65=75mOC=\sqrt{{40}^2+{75}^2}=85m$

Distance cover by dog$=OA+AB+BC+OC=140+65040+85=330$

Displacementbefore mastered called is

$OC=85m$