Question

Explain why it is difficult to walk on sand

Answer 1

This is because sand yields under the weight of the personwalking on it. This difficulty can be overcome by placing a wooden plank on the sand. Then the weight of the man will act on larger area and hence pressure exerted on sand decreases

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Answer 2

When we walk on the sand we push the sand with our feet but the sand yields, i.e., it does not react back with the same force. That is why it is difficult to walk on sand.

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