Results 1 to 2 of 2

Math Help - Work done .

  1. #1
    Senior Member
    Joined
    Jan 2009
    Posts
    381

    Work done .

    The formula of work done is dW=fds cos theta

    Why can't it be W=fs cos theta without the d ?

    I know the 'd' means change in something .

    So does it mean that the change in work done is the force multiplied by the change in displacement cos theta ?

    How can a force act on a changing displacement ?

    I know my question sounds weird .

    Thanks for your help and explaination .
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member malaygoel's Avatar
    Joined
    May 2006
    From
    India
    Posts
    648
    Quote Originally Posted by thereddevils View Post

    How can a force act on a changing displacement ?
    When you lift something, you are in constant touch with that thing...sine there is displacement due to your force(maintained through the contact),,,the force does work(implied by the formula).

    However, if you drop something, then the contact is soon lost and no displacement occurs while the thing was in contact with you...which implies no work.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Work--please check my work for me
    Posted in the Calculus Forum
    Replies: 3
    Last Post: February 1st 2011, 09:02 AM
  2. Replies: 1
    Last Post: July 21st 2010, 06:02 PM
  3. Replies: 1
    Last Post: December 4th 2007, 03:45 PM
  4. help with work
    Posted in the Calculus Forum
    Replies: 2
    Last Post: October 4th 2007, 10:36 AM
  5. work
    Posted in the Calculus Forum
    Replies: 0
    Last Post: May 20th 2007, 01:38 PM

Search Tags


/mathhelpforum @mathhelpforum