Airport Walkway Distance and Time

To find the person's velocity relative to the ground, $v_{\text{person|ground}}$, we add their velocity relative to the walkway, $v_{\text{person|walkway}}$, to the walkway's velocity relative to the ground, $v_{\text{walkway|ground}}$. Since the person walks in the same direction as the walkway's motion, the two velocities add directly.

The relationship for relative velocity in one dimension is:

$v_{\text{person|ground}} = v_{\text{walkway|ground}} + v_{\text{person|walkway}}$

Plugging in the given values:

$v_{\text{person|ground}} = 0.7 \text{ m/s} + 1.1 \text{ m/s} = 1.8 \text{ m/s}$