A piece of the iron nail when kept horizontally on the surface of the sand, rests on it but when kept vertically digs a small hole. Why does this happen?

Due to more pressure

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Due to less pressure

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Due to increased weight

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Due to reduced weight

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Solution

The correct option is A Due to more pressure
When the iron nail is vertical, area of contact is less. Pressure is inversely proportional to area. So, pressure is more when iron nail is vertical. Hence, it digs a small hole in the sand only when placed vertically.

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A piece of the iron nail when kept horizontally on the surface of the sand, rests on it but when kept vertically digs a small hole. Why does this happen?

The correct option is A Due to more pressureWhen the iron nail is vertical, area of contact is less. Pressure is inversely proportional to area. So, pressure is more when iron nail is vertical. Hence, it digs a small hole in the sand only when placed vertically.

The correct option is A Due to more pressure
When the iron nail is vertical, area of contact is less. Pressure is inversely proportional to area. So, pressure is more when iron nail is vertical. Hence, it digs a small hole in the sand only when placed vertically.