Question

You start this journey at your desk, by walking 5 m in the North direction to the front of the class, 21 m in the South direction to the water fountain, and then you retrace your steps back to your desk. Calculate your displacement.

Answer 1

Since you traced your steps back to your seat, your displacement is zero.

The given parameters;

• initial displacement, x₁ = 5 m North

• final displacement, x₂ = 21 m South

Displacement is defined as the change in the final position and initial position. It measures the shortest distance between your initial position and your final position.

When you start a journey from point x and return back to that same point x, your displacement is zero. This is because, your initial position and final position are equal, telling you that you are not displaced from your initial position.

Thus, since you traced your steps back to your seat, your displacement is zero.

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