Results 1 to 5 of 5

Math Help - Centripetal Force

  1. #1
    Junior Member
    Joined
    Sep 2010
    Posts
    67

    Centripetal Force

    A body of mass 5 kg moves in a counterclockwise circular path of radius 10 meters in the xy-plane, making one revolution every 7 seconds. At the time t=0, the body is at the rightmost point of the circle.

    r(t)= 10cos(2pi(t)/7i+10sin(2pi(t)/7

    Now my a(t)=r''(t) vector comes out to be:
    -40pi^2/49cos(2pi(t)/7)i-40pi^2/49sin(2pi(t)/7)

    Is this right?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,692
    Thanks
    450

    Re: Centripetal Force

    correct as I see it.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Sep 2010
    Posts
    67

    Re: Centripetal Force

    so the centripetal force is 5*[ -40pi^2/49cos(2pi(t)/7)i-40pi^2/49sin(2pi(t)/7) ]?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,692
    Thanks
    450

    Re: Centripetal Force

    Quote Originally Posted by Bracketology View Post
    so the centripetal force is 5*[ -40pi^2/49cos(2pi(t)/7)i-40pi^2/49sin(2pi(t)/7) ]?
    yes, Newton's second law of motion ... F_c = ma_c
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Sep 2010
    Posts
    67

    Re: Centripetal Force

    Thanks!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. centripetal force
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: July 26th 2009, 05:14 AM
  2. centripetal force
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: March 19th 2009, 02:20 PM
  3. [SOLVED] Centripetal Force
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: February 4th 2009, 01:48 AM
  4. Centripetal Force
    Posted in the Calculus Forum
    Replies: 2
    Last Post: December 4th 2008, 08:19 PM
  5. centripetal force.
    Posted in the Math Topics Forum
    Replies: 4
    Last Post: October 27th 2008, 07:15 AM

Search Tags


/mathhelpforum @mathhelpforum