Question

An object moves along the grid through the points A, B, C, D, E and F as shown in the figure. Find the magnitude of displacement covered by the moving object.

• A. $1.5\text{km}$
• B. $2\text{km}$
• C. $2.5\text{km}$
• D. $3\text{km}$

Answer 1

The correct option is C $2.5\text{km}$


We know that total displacement is the straight line distance between the final and initial position.
So, from the figure, we can say that $AF$ represents the total displacement of the object.
$\Rightarrow AF=\sqrt{A{M}^2+M{F}^2}$
By using the above figure
$AM=3-1.5+0.5=2\text{km}$
$MF=1+0.5=1.5\text{km}$
$\therefore AF=\sqrt{2^2+{1.5}^2}=2.5\text{km}$