1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Centripetal with friction

  1. Sep 15, 2010 #1
    1. The problem statement, all variables and given/known data
    a 200 g block placed inside a cylinder (attached to the curve surface, not the base or top of the cylinder) with diameter 1m. If the coefficient of friction is 0.5, find the linear speed of the block.

    2. Relevant equations
    v = ωr

    3. The attempt at a solution
    I do not know how to take friction into consideration when doing this problem. When I draw the free body diagram, there are 3 forces acting on the object: the normal force directed radially inward, the friction directed tangentially, and weight directed downward.
    So, normal force = mv2/r. After that, I do not know how to continue.

    Thank you very much

    just edit my post
    I just realized that the direction of friction is wrong. It should be upward. I've solved this problem
    Last edited: Sep 16, 2010
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted