1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Forces question

  1. Feb 26, 2010 #1
    A crate of books is to be put on a truck with
    the help of some planks sloping up at 33◦. The
    mass of the crate is 100 kg, and the coefficient
    of sliding friction between it and the planks is
    0.4. You and your friends push horizontally
    with a force ~F .
    The acceleration of gravity is 9.81 m/s2 .
    Once the crate has started to move, how
    large must F be in order to keep the crate
    moving at constant speed?
    Answer in units of kN.
     
  2. jcsd
  3. Feb 26, 2010 #2
    Show your work.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook