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!

Force + work

  1. Dec 2, 2004 #1
    One question related to newton's third law,
    v
    t p
    u o
    u o
    It is a rope with a wheel,v.
    If 50N is applied from u pulling towards the ground, what's the reaction force?
    From o to p ?

    Two questions related to work,
    I think the force in the equation of work done is continuously applied,like weight, right?
    And the object would not stop finally, right?

    For the PE, a weight of 100N is lifted up by a man up to a height of 10m.
    Why the force applied by the man continuously is 100N?
    Isn't 100 N causing no effect on the weight as it is compensated by the mg of the weight, right?
     
  2. jcsd
  3. Dec 2, 2004 #2

    arildno

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    "One question related to newton's third law,
    v
    t p
    u o
    u o
    It is a rope with a wheel,v.
    "
    What does this mean???
     
  4. Dec 2, 2004 #3
    :confused: :confused:
     
  5. Dec 3, 2004 #4
    How about these?
    Two questions related to work,
    I think the force in the equation of work done is continuously applied,like weight, right?
    And the object would not stop finally, right?

    For the PE, a weight of 100N is lifted up by a man up to a height of 10m.
    Why the force applied by the man continuously is 100N?
    Isn't 100 N causing no effect on the weight as it is compensated by the mg of the weight, right?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Force + work
  1. Work and force (Replies: 1)

  2. Force and Work. (Replies: 2)

  3. Work and forces (Replies: 4)

  4. Work and forces (Replies: 9)

Loading...