Question

007 (part 1 of 2) 10.0 points

While John is traveling along a straight inter-

state highway, he notices that the mile marker

reads 246 km. John travels until he reaches

the 147 km marker and then retraces his path

to the 172 km marker.

What is John's resultant displacement from

the 246 km marker?

Answer in units of km.

Answer 1

74 km

Step-by-step explanation:

Ler the position of markers be A,B, and C for notation 246 km, 172 km, and 147 km respectively. John's whole journey has been shown in the figure.

As given,his initial position was the point A. At first, he travelled from the point A to C, then he traveled back from the point C to B on the straight path. His final position is at the point B.

The resultant displacement equals to the shortest distance between the final and the initial positions.

So, the magnitude of the resultant displacement is |172-246| km=74 km and the direction is towards point B from point A.