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!

Force and motion problem

  1. Jun 30, 2015 #1
    1. The problem statement, all variables and given/known data
    A puck of mass m = 1.00 kg slides in a circle of radius r = 17.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 3.70 kg by a cord through a hole in the table. What speed keeps the cylinder at rest?

    http://edugen.wileyplus.com/edugen/courses/crs7165/art/qb/qu/c06/q55.jpg



    2. Relevant equations
    F=ma, a=v2/r



    3. The attempt at a solution
    I dont see why 0.785m/s is incorrect. thanks.

    http://i1164.photobucket.com/albums/q562/falsovero/20150630_150006_zpsk3vkjyjj.jpg
     
  2. jcsd
  3. Jun 30, 2015 #2

    Orodruin

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    The radius is 17 cm, not 1.7 cm.
     
  4. Jun 30, 2015 #3
    thanks, what an elementary mistake.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Force and motion problem
  1. Force and Motion problem (Replies: 18)

  2. Force and motion problem (Replies: 76)

Loading...