Question

Calculate the greatest and the least pressure exerted by a metal block of size 20cm×8cm×5cm having a mass of 5kg

Answer 1

125,00Pa; 3125Pa

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pressure=force/area

pressure is inversely proportional to the area of cross-section.

so, maximum area corresponds to least pressure.

so, least pressure= (5x10) / (0.2 x 0.08)=3125 pa

and, greatest pressure= (5x10) / (0.08 x 0.05)= 12500 pa