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: Mastering physics problem regarding speed and tension

  1. Feb 21, 2005 #1
    Two wires are tied to the 2.0 kg sphere shown in the figure View Figure . The sphere revolves in a horizontal circle at constant speed.

    For what speed is the tension the same in both wires?

    What is the tension?

    I reallllly need some hints to figure the first part, and the second part...thank you

    Attached Files:

  2. jcsd
  3. Feb 21, 2005 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    Find the vertical force on the sphere in terms of the vertical components of the tension (1).

    Then write the equation (2) for the horizontal force on the sphere (in terms of [itex]\omega[/itex] and r

    Then find the lengths of the wires in order to find r.

    Substitute r into (2) (both tensions = T) and use T from (1) to find [itex]\omega[/itex]

  4. Feb 21, 2005 #3
    yeah, got the answer, thanks
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook