Results 1 to 5 of 5

Math Help - angular speed, tangetial speed.

  1. #1
    Senior Member
    Joined
    Jan 2007
    Posts
    477

    angular speed, tangetial speed.

    The earth orbits the sun once a year (3.16 x 10^7 s) in a nearly circular orbit radius 1.50 x 10^11 m. With respect to the sun, determine the following.

    (a) the angular speed of the earth
    rad/s

    (b) the tangential speed of the earth
    m/s

    (c) the magnitude and direction of the earth's centripetal acceleration magnitude m/s^2


    i don't understand why a kinematic equation does not work for this.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Jan 2007
    Posts
    477
    anyone around to grab this one please?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by rcmango View Post
    The earth orbits the sun once a year (3.16 x 10^7 s) in a nearly circular orbit radius 1.50 x 10^11 m. With respect to the sun, determine the following.

    (a) the angular speed of the earth
    rad/s
    \dot{\theta}=2\pi/\tau = 2\pi/[3.16\times 10^7] rad/s

    (b) the tangential speed of the earth
    m/s
    v_{tang}=r \dot{\theta}

    (c) the magnitude and direction of the earth's centripetal acceleration magnitude m/s^2
    Direction is radialy inwards and its magnitude is:

     <br />
a_{centripedal}=v_{tang} \dot{\theta}<br />

    RonL
    Last edited by CaptainBlack; November 24th 2007 at 11:30 AM.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Senior Member
    Joined
    Jan 2007
    Posts
    477
    i'm not sure how the answer is reached by the above calc, but 1.99e-07 is correct. for the first one. i got 4.186E-11 ?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by rcmango View Post
    i'm not sure how the answer is reached by the above calc, but 1.99e-07 is correct. for the first one. i got 4.186E-11 ?
    There was a type (now corrected) but you should be on the look out for these.

    RonL
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Angular Speed
    Posted in the Calculus Forum
    Replies: 2
    Last Post: February 22nd 2010, 09:07 PM
  2. Angular Speed.....
    Posted in the Algebra Forum
    Replies: 2
    Last Post: October 7th 2008, 03:15 PM
  3. Angular Speed...
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: October 7th 2008, 02:48 PM
  4. tangetial speed
    Posted in the Math Topics Forum
    Replies: 0
    Last Post: November 26th 2007, 06:51 PM
  5. Angular speed
    Posted in the Advanced Applied Math Forum
    Replies: 0
    Last Post: May 9th 2007, 02:27 PM

Search Tags


/mathhelpforum @mathhelpforum