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!

Finding Tension when Mass Accelerates

  1. Oct 21, 2009 #1
    1. The problem statement, all variables and given/known data
    A mass of .500 kg is resting on the ground. Attached is a cord that makes a 30-degree angle with the horizontal. It is found that when the cord is pulled tight enough, the mass will skip along the ground without friction. How much tension is in the cord?

    2. Relevant equations

    3. The attempt at a solution
    I have no idea how to start this..
  2. jcsd
  3. Oct 21, 2009 #2
    Start with the sum of forces in the x and y direction.
  4. Oct 21, 2009 #3
    So [tex]\Sigma[/tex]Fx=Tcos30
    and [tex]\Sigma[/tex]Fy=Tsin30-Fg
  5. Oct 21, 2009 #4
    Yeah thats right. Is this at a constant speed? Meaning no acceleration?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook