1. Not finding help here? Sign up for a free 30min 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!

Uniform Circular Motion

  1. Sep 6, 2009 #1
    1. The problem statement, all variables and given/known data

    A particle of mass m=1kg moves counterclockwise in a horizontal circle of radius r=1m with uniform speed of 1 m/s. Determine the velocity, acceleration, total force and the component of the the total force on the particle in direction of its velocity as a function of the angle.

    2. Relevant equations

    a = v*v / r
    F=ma

    3. The attempt at a solution

    Velocity = - 1 m/s
    (negative sign is to indicate the direction of the particle moving counterclockwise)

    Acceleration, a = 1

    Total force,F = 1N

    Is there anyone can help me to confirm my answer? Especially the velocity....
     
  2. jcsd
  3. Sep 6, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Velocity, acceleration, and force are all vectors. You must specify their direction as a function of angle. (I would use unit vectors and some trig functions.)
     
  4. Sep 6, 2009 #3

    Redbelly98

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    I'm not familiar with using negative values to express the counterclockwise direction, is that a convention your professor said to use? It may be that just saying "1 m/s, counterclockwise" could be sufficient.

    Your values for a and F are correct, but you are probably expected to indicate their direction as well.

    EDIT: ahh, Doc Al responded faster than I.
     
  5. Sep 6, 2009 #4
    Thanks for the comments! I will try again ^.^
     
  6. Sep 6, 2009 #5
    Shouldn't you express the velocity in terms of rad/s since the last part say express as a function of the angle? If that is the case then acceleration would have to change too?
     
  7. Sep 6, 2009 #6

    Doc Al

    User Avatar

    Staff: Mentor

    They are asking about linear velocity (the tangential velocity) not angular velocity.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Uniform Circular Motion
Loading...