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!

Conceptual Question (Rotational Kinematics)

  1. Feb 7, 2005 #1
    A thin rod rotates at a constant angular spped. COnsider the tangential spped of each point on the rod for the case when the axis of rotation is perpendicular to the rod (a) at its center and (b) at one end. Explain for each case whether there are any points on the rod that have the same tangential speeds :smile:

    This came from Cutnell and Johnson Physics 5th edition, does anyone know where I could find answer to thier conceptual quesitons, math would be nice too ,thanks :rolleyes:
  2. jcsd
  3. Feb 7, 2005 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    Usually conceptual questions are answered by thinking about them. They test whether you understand the concepts. Finding answers from a source other than your mind defeats their purpose.

    (Assume that the 'points' being referred to have a single co-ordinate being the distance from the axis of rotation). So the question is really asking, are there two locations on the rod that have the same tangential speed? Given that the rod has a constant angular speed, what determines tangential speed? To answer this you have to know the mathematical expression for tangential speed: how fast would an ant a distance d from the axis be moving if the rod is moving at constant angular speed [itex]\omega[/itex]?

    Then apply this to situations a) and b).

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Conceptual Question (Rotational Kinematics)