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

Answer:

P = 20 kPa

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

$P=\dfrac{mg}{A}\\\\P=\dfrac{12\times 9.8}{0.00588}\\\\P=20000\ Pa\\\\\text{or}\\\\P=20\ kPa$

So, the required pressure is 20 kPa.