A brick of weight 4 kgf having dimensions 20 cm x 10 cm x 5 cm exerts maximum pressure on surface when it is placed on ground with its

 

  •  A brick of weight 4 kgf having dimensions 20 cm x 10 cm x 5 cm exerts maximum pressure on surface when it is placed on ground with its 

1.     Longest side (20 cm) vertical

2.     Shortest side (5 cm) vertical

3.     Medium side (10 cm) vertical

4.     None of these

Ans.   As you know that pressure = force / area

         Here, force is given i.e.4 kgf.

         For pressure to be maximum, area will be minimum

          Now area will be minimum when longest side is vertical.

          Therefore option 1. Longest side (20 cm) vertical is correct.

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