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!

Homework Help: Fluids Problem help invovling floating

  1. Nov 9, 2011 #1
    1. The problem statement, all variables and given/known data
    A racquetball with a diameter of 5.6 cm and a mass of 42 g is cut in half to make a boat for American pennies made after 1982. The mass and volume of an American penny made after 1982 are 2.5 g and 0.36 cm3. How many pennies can be placed in the racquetball boat without sinking it? (The density of water is 1000 kg/m3.)

    2. Relevant equations
    FB = mobjectg

    3. The attempt at a solution
    I've tried finding the densities of both objects and equating it to 1000 to find the number of pennies, but it didn't work. What else should I do?
  2. jcsd
  3. Nov 9, 2011 #2


    User Avatar

    Staff: Mentor

    What's the buoyant force on a racquetball submerged to half its diameter?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook