# Total force exerted on the can by the air pressure?

1. Nov 6, 2007

### Sucks@Physics

A small quanitity of water is poured into a can, the water is brought to a boil. Then the can is sealed with a rubber stopper. As you watch, the can is slowly crushed with sounds of metal bending. Assuming the dimensions of the can are 0.24m x 0.16m x 0.10m and the inside of the can is in a perfect vacuum, what is the total force exerted on the can by the air pressure?

Now I don't just need the answer i need to know how to solve it. Thanks in advance !

Last edited: Nov 6, 2007
2. Nov 6, 2007

### learningphysics

what is the pressure outside the can? what is the surface area of the can. I assume the can is a cube given the dimensions...

what is the relationship between force, pressure and area?

3. Nov 6, 2007

### Sucks@Physics

That's all the question gives me. I'm guessing 1 atm pressure and the area is .00384 m from the given dimesions? I'm not completely sure

4. Nov 6, 2007

### learningphysics

you calculated the volume of the cube... you need the surface area. so the sum of the areas of the 6 sides. convert 1 atm to pascals...

Last edited: Nov 6, 2007
5. Nov 7, 2007

### Sucks@Physics

I still dont know how to do this problem can some1 give me formulas?

6. Nov 7, 2007

### learningphysics

length = 0.24m
width = 0.16m
height = 0.10m

can you find the area of the 6 sides of the cube?

side 1 and 2... length*width
side 3 and 4... width*height etc...

Last edited: Nov 7, 2007
7. Nov 7, 2007

.1568

8. Nov 7, 2007

### learningphysics

exactly. And what's the pressure outside the can in Pa?

9. Nov 8, 2007

### Sucks@Physics

1.01 KPa so you just multiply them together correct?