Pressure= Force/ Area

1. Nov 17, 2011

physgrl

1. The problem statement, all variables and given/known data

6. A person weighing 900 N is standing on snowshoes. Each snowshoe has an area of 2500 cm2. Find the pressure on the snow.

a. 0.18 Pa
b. 0.36 Pa
c. 1800 Pa
d. 3600 Pa

2. Relevant equations

P=F/A

3. The attempt at a solution

I tried doing F/(2*(A))
A=2500cm2/1002cm2 *1m2=.25
P=900/(2+.25)
P=1800

but the answer key says it it .18 instead

2. Nov 17, 2011

LawrenceC

A Pascal is 1 Newton per square meter. I agree with your answer.

3. Nov 17, 2011

craglyboy

Nope ignore me

4. Nov 17, 2011

sophiecentaur

physgrl
Your answer looks right to me (if you want the answer in Pa) - it can be done in your head. You didn't actually put in the units for your answer so you are strictly not right or wrong - your answer is just incomplete.
The pressure in N/cmsq is 0.18 but which unit is given in the mark scheme?

5. Nov 17, 2011

physgrl

The answers are all in Pa

6. Nov 17, 2011

sophiecentaur

So you are right and 'the answer' looks wrong.

7. Nov 17, 2011

Ok lol