When standing on loose sand, the thrust (or weight) is acting on a smaller area (the area of your feet), causing a greater impact on the sand. When lying down, the same thrust is distributed over a larger area (the contact area of your whole body), reducing the impact on the sand.
How does the area of contact affect the impact of thrust when standing on loose sand versus lying down on it?
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The area of contact affects thrust impact on loose sand by distributing weight over a larger surface when lying down, reducing pressure and preventing sinking. Standing concentrates weight on a smaller area, increasing pressure and causing deeper sinking. Hence, lying down minimizes impact compared to standing.