Physics
A block of iron of mass 7.5 kg and of dimensions 12 cm x 8 cm x 10 cm is kept on a table top on it's base of side 12 cm x 8 cm. Calculate (a) thrust and (b) pressure exerted on the table top. Take 1 kgf = 10 N.
Fluids Pressure
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Answer
As we know,
(a) Force (F) = mass (m) x acceleration due to gravity (g)
Given,
m = 7.5 kg
1 kgf = 10 N
Substituting the values in the formula above we get,
Hence, F = 75 N
(b) As we know,
Pressure (P) =
Given,
Area of the base = 12 x 8 = 96 cm2
Converting cm2 into m2
100 cm = 1 m
So, 100 cm x 100 cm = 1 m2
Hence, 96 cm2 =
Therefore, A = 0.0096 m 2
Substituting the values in the formula above, we get,
Hence,
Pressure = 7812.5 Pa
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