Question

The bottom of a box has a surface area of 58.8 cm 2 . The mass of the box is 12.0 kg. Acceleration due to gravity at sea level is 9.80 m/s 2 . What is the pressure exerted by the box where it rests

Answer 1

P = 20 kPa

Step-by-step explanation:

Given that,

The surface area of the bottom of the box, A = 58.8 cm² = 0.00588 m²

The mass of the box, m = 12 kg

The acceleration due to gravity, g = 9.8 m/s²

We need to find the pressure exerted by the box where it rests. Oressure is equal to the force acting per unit area. So,

Pressure = Force/Area

`P=(mg)/(A)\\\\P=(12* 9.8)/(0.00588)\\\\P=20000\ Pa\\\\\text{or}\\\\P=20\ kPa`

So, the required pressure is 20 kPa.