One of the concrete pillars that supports a house is 1.9 m tall and has a radius of 0.55 m. The density of concrete is about 2.2 x 103 kg/m3. Find the weight of this pillar in pounds (1 N = 0.2248 lb).

Answer 1

W=mg=ρVg= ρπr²hg=
=2.2•10³•π•0.55²•1.9•9.8 =
=38929 N=173173 lb