Calculate the pressure exerted by an iron rod of radius 2cm when struck on ground surface by a force of 20 N.
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Explanation:
pressure = force/area
force ° 20N
area = πr^2
3.14×2^2
3.14×4 =12.56
pressure = 20/12.56
20×100/1256
2000/1256
1.59pascal
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