Question

If a wooden cube has length and breath of 1.5 m each and it exerting a pessure of 1200 pa. what isits weight ( f ) ? ​

Answer 1

Answer:

The cube weighs 2700 N

Explanation:

Pressure is defined as a Force over an Area.

p = F / A

We can rearrange this to make the Force the subject

F = p * A

The pressure is given as 1200 Pa.

We know a pascal is 1 Newton / Square metre = N/m²

The area of a cube will be width * breadth = 1.5 m * 1.5 m= 2.25 m²

So the force the cube is pushing down with (its weight) is simply

F = p * A = 1200 N/m² * 2.25 m² = 2700 N

Weight is officialy defined as a force measured in Newtons, but when we talk about weight we often give it in Kilograms (a unit of mass).

To get the weight in units of Kilogram-force you must divide by the gravitational acceleration ≈9.81 m/s²

2700 / 9.81 = 275.23 Kg