Question

5. If Brook has a mass of 87 kg and applies a pressure of 9800 N/m2 when in bed. What is I

the surface area between Brook and the bed?

Answer 1

We have,

• Mass of brook = 87 kg
• Pressure applied by it on the ground = 9800 N/m²

Now, we know that,

• Pressure = Force/Area

We are provided with pressure applied butbwe need to calculate force;

• F = ma
• F = 87 × 9.8 { Accleration due to gravity }

Finally, just put all these values in pressure's formula:

• P = F/A
• 9800 = 87 × 9.8 / A
• 98000/87 × 98 = A
• 1000/87 = A
• 11.49 = A
• 11.5 m²(Approx) = A

Thus, the surface area between the brook and bed is 11.5 m².