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!

-Frictional force

  1. Nov 12, 2007 #1
    [SOLVED] URGENT---Frictional force

    A force of 1.6N is applied to a box of mass 1.8Kg. It accelerates 0.6m/s^2. Determine Ff and the coefficient of kientic friction.

    K so I knoe how to do this. But in the text book, it has been done in a different way.

    So what I did is Found the net force using F=ma.
    Then i subtract from 1.6 and get Ff.
    Then use the formula mk= Ff/Fn

    In the book they took Ff=ma
    Which is the right solution?
     
  2. jcsd
  3. Nov 12, 2007 #2

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Well [itex]F_{net}=F_{applied}-F_k [/itex] where [itex] F_k[/itex] is the force due to kinetic friction. So with a bit of manipulating one can see that the friction force will be the applied force minus the net force which can be worked out from the acceleration of the block.
     
  4. Nov 12, 2007 #3
    And fnet is MA
     
  5. Nov 12, 2007 #4

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Yes.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: -Frictional force
  1. Net Force, Smhet Force (Replies: 3)

Loading...