While John is traveling along a straight interstate highway, he notices that the mile marker reads 239 km. John travels until he reaches the 149 km marker and then retraces his path to the 167 km marker. What is John’s resultant displacement from the 239 km marker?

72 km

Explanation:

We are given that

John marker reads=239 km

John travels and reaches the marker=149 km

John retraces his path and reaches the marker=167 km

We have to find the John's resultant displacement from 239 km.

Displacement:The displacement is the distance between two positions.

By definition of displacement

John's resultant displacement from 239 km=239-167

John's resultant displacement from 239 km=72 km

Hence, John's resultant displacement from 239 km=72 km

f=ma newton

f=100x2.5=250n