1 Answer

Jfneis · Answer 1 · 2021-04-24T10:46:24+0000

Answer:

Explanation:36.05 km

Given

First car travels
$r_1=20\ km$ South

then turns and travels
$r_2=30\ km$ east

Suppose south as negative y axis and east as positive x axis

So,
$r_1=-20\hat{j}$

$r_2=30\hat{i}$

Displacement is the shortest between initial and final point

Dispalcement
=r=r_1+r_2

Displacement
$=-20\hat{j}+30\hat{i}$

Displacement
$=30\hat{i}-20\hat{j}$

Magnitude
=√(30^2+(-20)^2)

Magnitude
$=36.05\ km$

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