Q.a.)A fireman has a mass of 100g. he has to rescue a cat from a frozen pond. The ice will crack if the pressure exceeds 25,00 Pa. His shoes have a surface area of 20cm squared each. Will the ice break if he walks on it?
A.a.) Yes. The pressure exceeds 25,00 pascals.
Q.b.)The fireman uses a plank instead, with a surface area of 5m squared.Can the fireman rescue the cat from the pond without breaking the ice?
A.b.) Yes. Because his weight is spread evenly over a wider area, unlike his shoes.
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