A brick that has a mass of 3.5 kg exerts a pressure of 4.905 kPa on the ground. What is the size of the brick's contact area?

Question

Quizplus · Accepted Answer

Using the equation: Pressure (kPa) = (Force / Area) / 1000 4.905 = ((3.5 × 9.81) / Area) / 1000 4.905 × 1000 = 34.335 / Area 4905 × Area = 34.335 Area = 34.335/4905 Area = 0.007 m² Note: The "Force / Area" part of the equation is divided by 1000 to ensure that the resulting pressure is in units of kPa, rather than Pa or N/m² (i.e. 1 kPa = 1000 Pa or N/m²)

A Brick That Has a Mass of 3