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: Cart rolling down hill

  1. Mar 10, 2010 #1
    1. The problem statement, all variables and given/known data
    An 0.80-kg cart rolls down a 30.0° hill from a
    vertical height of 0.50 m. The distance that the cart must roll to the bottom of
    the hill is 0.50 m/sin 30.0°=1.0 m. The surface of
    the hill exerts a frictional force of 5.0 N on the cart.
    Does the cart roll to the bottom of the hill?

    2. Relevant equations
    I do know what equation to use or how to get the problem started.

    3. The attempt at a solution
    so it doesn't over come the frictional force.
    Last edited: Mar 10, 2010
  2. jcsd
  3. Mar 11, 2010 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi rawr8712! Welcome to PF! :smile:

    Yes, the downhill component of gravity is 3.92N, so if the friction force is 5N, the cart will accelerate uphill!!. :rolleyes:

    Are you sure you've copied the question accurately?​
  4. Apr 11, 2010 #3
    Re: Welcome to PF!

    the cart will not accelerate up the hill seeing as the force stated for friction is the maximum force that friction can exert not a constant. therefore the cart will not move
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook