Results 1 to 6 of 6

Math Help - Help with physics

  1. #1
    Member
    Joined
    Aug 2012
    From
    new orleans
    Posts
    131
    Thanks
    1

    Help with physics

    A father (m = 94 kg) and son (m = 48 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast will the father be moving?


    Which equation is used to solve this? Can you set up the problem for me?
    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,698
    Thanks
    454

    Re: Help with physics

    conservation of linear momentum ...

    initial momentum = final momentum

    0 = m_{son}(-3 \, m/s) + m_{father} \cdot v_f
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Aug 2012
    From
    new orleans
    Posts
    131
    Thanks
    1

    Re: Help with physics

    what is the final velocity
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,698
    Thanks
    454

    Re: Help with physics

    Quote Originally Posted by Louisana1 View Post
    what is the final velocity
    I've set up the equation and you can't figure it out?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Member
    Joined
    Aug 2012
    From
    new orleans
    Posts
    131
    Thanks
    1

    Re: Help with physics

    48(-3)+94 x vf
    -50 but what is the vf in this problem. I'm still working at it
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Member
    Joined
    Aug 2012
    From
    new orleans
    Posts
    131
    Thanks
    1

    Re: Help with physics

    -48(-3)/94=1.53 m/s
    thx
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Got a physics question or interested in physics?
    Posted in the Math Topics Forum
    Replies: 16
    Last Post: February 3rd 2014, 01:56 AM
  2. how do solve quantum physics or physics equations
    Posted in the Advanced Applied Math Forum
    Replies: 2
    Last Post: March 26th 2008, 04:33 AM
  3. physics, acceleration, physics problem
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: September 29th 2007, 03:50 AM
  4. Somewhat physics...
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: July 30th 2007, 04:52 PM
  5. need help please (physics)
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: July 26th 2007, 04:21 PM

Search Tags


/mathhelpforum @mathhelpforum