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: Relative velocities

  1. Apr 4, 2013 #1
    Source: Engineering Mechanics Dynamics - Hibbeler
    My friends and I have discussed and have no idea how to solve.
    So we looked at the textbook.

    We were told to use this equation.


    In this equation, A/B means 'A respect to B'
    Also, the equation is derived based on an intermediate frame attached to point B, which is rotating at [itex]\omega[/itex].

    In the textbook's solution below, however, the intermediate frame is attached to point B, but the [itex]\omega[/itex] is to the right of the frame (the centre of the prescribed circle). The [itex]\omega[/itex] is no longer about the frame through point B.

    Hence, we have our suspicious of the textbook solution.
    Anyway has got any idea if we're wrong, or is the textbook wrong?

  2. jcsd
  3. Apr 5, 2013 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    ω is the same everywhere in a rotating frame.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted