# Incorrect Pressure

jefgreen

## Homework Statement

A crate, whose bottom surface is 50.4 cm by 28.3 cm, exerts a pressure of 2.50x10^3 Pa on the floor. What is the mass of the crate.

## Homework Equations

P=F/A
m=weight/gravity (9.80)

## The Attempt at a Solution

2.50x10^3 F
------------=----------------
1 1.4x10^3 cm^2

F=3.5x10^6

m=weight/9.80

m=3.5x10^6
-----------
9.80

I feel as though I made a mistake somewhere...

Homework Helper
You have convert the length and the width from cm to meter.

jefgreen
so I would multiply 2.50x20^3 by .787 (.283m+.504m)?

Homework Helper
so I would multiply 2.50x20^3 by .787 (.283m+.504m)?
What is the formula for area?

.787 (.283m+.504m)
What is this?

jefgreen
What is the formula for area?

.787 (.283m+.504m)
What is this?

lxw?

jefgreen
A=lxw

So.. (.283m x .504m)= 0.119952. I am not sure about the units, but is this the correct answer?

jefgreen
would it be meters squared (m^2)?

Homework Helper
A=lxw

So.. (.283m x .504m)= 0.119952. I am not sure about the units, but is this the correct answer?
Now it is correct. Unit of the area is m^2.
Now F = P*A = ........?

jefgreen
F=299.88N

so....

m=weight/9.80

therefore m=299.88N/9.80 m/s^2

mass equals.... 30.6kg

Correct?

Homework Helper
Correct.