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: Lab question regarding cylinders

  1. Sep 4, 2009 #1
    im trying to do a lab on rotational inertia of a hollow cylinder
    i plan to roll a hollow cylinder down an incline
    and see how the inner radius, outer radius, and mass affects the final translational velocity
    but i am not sure what i can use for the cylinder
    to sufficiently control and alter the variables

    does anyone have any ideas?
    thanks in advance
  2. jcsd
  3. Sep 4, 2009 #2


    Staff: Mentor

    Different sizes of pipe -- iron pipe, plastic pipe, and so on.
    Empty "tin" cans of various sizes with the ends cut off.
    Surely you can think of more...
  4. Sep 4, 2009 #3


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Try two identical cans of mushroom soup, one at room temperature and one left in the freezer overnight.
  5. Sep 4, 2009 #4
    An easy way to control other variables such as density might be to use a cylinder in which you can drill holes of different sizes.A broomstick and a candle come to mind.You can get candles of very large radii.
  6. Sep 4, 2009 #5
    Only if it's Campbells mushroom soup:biggrin:
  7. Sep 4, 2009 #6
    pipes are a bad idea because i would need at least 15 data different data values and i cant really slowly increase or reduce the radius
    i also need uniform density so i cant use different types of pipes

    freezing a can would also just give 2 data values which would not be enough

    i think thats a great idea and its worth a try

    but does anyone kno anything kind of like tissue or tape
    that i can constantly wrap around to increase the radius?
    it would be great if its much thicker than tissue because tissue would take forever to increase the radius

    thanks in advance
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook