Take some powdered lime in a tray. place a brick on it in three different ways as shown in the figure.
a) In which arrangement of the brick does it produce more pressure in powdered lime?
b) The area of contact of the brick with powdered lime when it is placed vertically is 0.02 meter square. calculate the pressure exerted by the brick of weight 30 N on the lime powder.
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a) In arrangement (a) vertical the brick will produce most pressure as because of less area.
b) pressure = force/area
= 30/0.02
= 30/2/100
= 30•100/2
= 1500 pascal
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