1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Pressure= c

  1. Nov 17, 2011 #1
    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. jcsd
  3. Nov 17, 2011 #2
    You have done exactly the right thing.
    The area of 1 shoe = 0.25m^2
    so 2 shoes = 0.5m^2 BUT IN YOUR EQUATION you have written 2 + 0.25 !!!! should be 2 x 0.25
    This will give P = 1800Pa. I think the answer 0.18 is wrong !!!!!
     
  4. Nov 17, 2011 #3
    yeah .18 is wrong for sure
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook