Jump to content


Photo

I Don't Understand A Friction Execise


  • Please log in to reply
2 replies to this topic

#1 thefree

thefree

    New Member

  • Members
  • Pip
  • 2 posts

Posted 28 April 2009 - 11:21 PM

Hello,
I have a problem with the exercise "Sharpen your pencil" at pag.495.

Point d says:"Use the fact that frictional.... to arrive at an equation that only involves the components of FFric, the mass, the coefficient and the gravitational field strength".

But in the answer I see : u(mg - Frv) = Frh

Is this correct ?
I'm not English mothertounge, so maybe this is the reason.. wink.gif
But I don't really get it: I see only components of Frope and NOT compenents of Ffric.

Thanks
Alessandro


#2 HeatherLang

HeatherLang

    Active Member

  • O'Reilly Author
  • PipPip
  • 27 posts

Posted 04 May 2009 - 01:31 PM

QUOTE (thefree @ Apr 29 2009, 07:21 AM) <{POST_SNAPBACK}>
But I don't really get it: I see only components of Frope and NOT compenents of Ffric.


You're absolutely right - the question should ask for components of the force applied by the rope, Fr , not Ffric.

Sorry about the mistake - unfortunately this one slipped through technical review. Thanks for checking, and I have submitted it as an error so that it will be corrected in future reprints.

#3 Monetsmith

Monetsmith

    New Member

  • Members
  • Pip
  • 8 posts
  • Gender:Male
  • Interests:My hobbies is to play the cricket and watch the reality show

Posted 06 June 2013 - 12:52 AM

I haven't understood the concept of friction exercise. Could anyone make me understand in the simpler form??
.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users