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!

Please help with Uniform Circular Motion

  1. Oct 1, 2007 #1
    Here is the questions:
    A box of mass m= 10 kg is sitting on the floor of a truck as the truck rounds a curve to the left of radius 15 m at 12 m/s. There is friction between the box and the floor of the truck with mus= .45 and muk = .20.

    1. Does the box slide?
    2. If the box slides, in what direction and with what acceleration?
    3. If the box doesn't slide, what would the coefficient of static friction be in order for it to slide?
     
  2. jcsd
  3. Oct 1, 2007 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    You will have to show us what you have done first. What are the forces on the box?

    AM
     
  4. Oct 2, 2007 #3
    So far i have drawn a free-body diagram with the normal force upward, and the centripetal, static friction, and kinetic friction forces drawn to the right. The force of gravity is of course pointing downward. I have calculated the Static force as being 44.1 N, the kinetic force as being 19.6 N, and the centripetal force as 96 N. I concluded that the box does slide because the centripetal force is greater than the frictional force. For centripetal acceleration i got 9.6 m/s^2. However, i was just confused as to how to calculate the acceleration when the box slides. Please help.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Please help with Uniform Circular Motion
Loading...