Question

an aluminum cylinder, of height h=2ocm and of radius r=1ocm, rests with its base on a horizontal table. Density of aluminum P=2700kg/m^3
a-calculate the weight of the cylinder take g=10N/kg
b-what is the value of the force exerted by the table on the cylinder?
c-deduce the magnitude of the force exerted by the cylinder on the table
d-calculate the pressure exerted by the cylinder on the table

Answer 1

Defining z axis up:

area of base of cylinder A= pi r^2
where r = 20 cm = .20 meter

height of cylinder = .10 meter

volume of cylinder V= pi r^2 h
= pi (.2)^2 (.1)

weight of cylinder W = g V = 10 V in Newtons

b) +W

c) -W

d) W/A in Newtons/meter^2 or Pascals