Displacement: Magnitude and Direction

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SUMMARY

Jim's net displacement after walking 100m south, 60m east, and 20m north can be calculated using the formula for displacement: d = √((x2-x1)² + (y2-y1)²). The net displacement magnitude is determined by the straight-line distance from the starting point to the endpoint. To express direction, one must calculate the angle of the resultant vector relative to the horizontal x-axis, which can be achieved through trigonometric functions.

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Homework Statement



Jim walks 100m due south, 60m due east, and then 20m due north. What is his net
displacement (both magnitude and direction)?

Homework Equations



I know how to find the net displacement by the magnitude of the distance...
using the d = sq. rt ( (x2-x1)^2 + (y2-y1)^2 )

but i don't know how to express the direction?

PLEASE HELP!

The Attempt at a Solution

 
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Draw the path on graph paper then draw a line back to the start - the direction is just the angle of this line ( usually given from the horizontal x-axis )
The magnitude is the length of this line.
 

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