# Calculate pressure

1. Jan 14, 2016

### Nanu Nana

1. The problem statement, all variables and given/known data
Calculate the pressure that an elephant with a mass of 4000 kg on the ground as the diameter of his legs is 25 cm

2. Relevant equations
P=F/A
F=mxg

3. The attempt at a solution
pressure = F/ A
diameter = 25 cm =>0.25m
I suppose his leg has form of circle so A = 3.14x (0.125)^2=0.049087
F=mass x g
F=4000kg x 9.81
F=39240 N
Thus,
P= 39240N / 0.049087 m^2 = 799390 Pa
But the answer should be 2.000x10^5 Pa

2. Jan 14, 2016

### Staff: Mentor

Does the elephant have only one leg?

3. Jan 14, 2016

### Staff: Mentor

How many legs does an elephant have...

EDIT -- Rats! Beaten out by a phone booth again!

4. Jan 14, 2016

### Nanu Nana

LOL . 4 legs indeed . thank you

5. Jan 14, 2016

### Nanu Nana

4 :D

6. Jan 14, 2016

### Staff: Mentor

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