Question

a) Explain why is difficult to walk on sand.

Answer 1

Answer:

The main reason it is difficult to walk on sand is because the sand grains are unconsolidated (loose). ... In contrast, if you walk on a hard sandstone, the grains are cemented and create a hard surface, so if you walk on solid rock, the grains mostly stay in place. You have a much more stable surface.

Explanation:

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Answer 2

★★ While walking, certain force can be applied by the feet on the road. since the road remains stationary it is able to provide a reactionary force to your feet which is essential to walk normally. Sand is composed of a large number of small grains which move away and they can consolidate themselves when we apply the same force with our feet. So the reaction force by the sand is so less. Hence it is difficult to walk on the road.