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CBSE Class 9 Answered

Calculate the pressure exerted by a cube of side 6cm and mass 2kg kept on a table.

Asked by Topperlearning User | 13 Jul, 2016, 09:39: AM
Expert Answer
Mass, m = 2 kg
 
Acceleration due to gravity, g = 9.8 m / s2
 
Weight , W = 2 × 9.8 = 19.6 N

begin mathsize 12px style straight l equals 6 space cm equals 6 cross times 10 to the power of negative 2 end exponent space straight m
rightwards arrow straight A equals straight l squared equals open parentheses 6 cross times 10 to the power of negative 2 end exponent close parentheses squared equals 36 cross times 10 to the power of negative 4 end exponent space straight m squared
Pressure equals Force over Area equals fraction numerator 19.6 over denominator 36 cross times 10 to the power of negative 4 end exponent end fraction equals 0.5444 cross times 10 to the power of 4
rightwards arrow Pressure equals 5444 space Pa

end style
Answered by | 13 Jul, 2016, 11:39: AM
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