The displacement of a particle moving along the $x$-axis from initial position $x_i$ to final position $x_f$ is defined as
A$x_i-x_f$
B$x_f-x_i$
C$\dfrac{x_f}{x_i}$
D$x_f+x_i$
Answer & Solution
Correct answer: B. $x_f-x_i$
Displacement is the change in position, defined as final position minus initial position: $\Delta x=x_f-x_i$. It can be positive, negative, or zero depending on direction.
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