1. An iron box has dimensions of 75 cm x 30 cm X 15
cm. Calculate pressure exerted by the iron box on the
soil, if a force of 7.5 N is applied when it is placed on
a) 75 cm x 30 cm as base
b) 30 cm x 15 cm as base
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Answer:
Dimensions 30 cm x 20 cm x 15 cm = 0.3 m x 0.2 m x 0.15 m
The resting surface has an area = 0.2 x 0.15 = 0.03m²
Weight of the cuboid = 30 x 10 = 300N
Pressure = Force(Weight) / Area
= 300/0.03 = 10000 N/m²
Explanation:
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