While John is traveling along a straight interstate highway, he notices that the mile marker reads 258 km. John travels until he reaches the 137 km marker and then retraces his path to the 176 km marker. 1) What is John’s resultant displacement from the 258 km marker? 2) How far has he traveled?

Answer 1

1. D = (137-258) + (258-137) + (176-258) = -121+121-82 = -82 km = 82 km
below 258 km marker.

2. d = 121+ 121+82 =