Introduction to Pressure
- It is defined as the force acting normally (perpendicularly) per unit area- The SI units for pressure is newton per metre squared (N/m² or Nm-2)
. - One Nm-2 is known as one Pascal (Pa).
Formula for Pressure
Maximum and Minimum Pressure
Examples: Calculating Pressure
A rectangular brick of weight 24 N, measures 60 cm × 20 cm × 30 cm. calculate the values of the
maximum and minimum pressures which the block exert when resting on a horizontal table.
Solution
Area of the smallest face = 0.2 × 0.3 = 0.06 m²
Area of the largest face = 0.6 × 0.3 = 0.18 m²
Solution
Area of the smallest face = 0.2 × 0.3 = 0.06 m²
Area of the largest face = 0.6 × 0.3 = 0.18 m²