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!

Angular acceleration of a drill

  1. Nov 2, 2009 #1
    1. The problem statement, all variables and given/known data
    A dentist's drill starts from rest. After 2.90 s of constant angular acceleration it turns at a rate of 2.20 x 10^4 rev/min.
    (a) Find the drill's angular acceleration (in rad/sec^2).
    (b) Determine the angle (in radians) through which the drill rotates during this period.

    2. Relevant equations



    3. The attempt at a solution
    okay so for (a) I thought that I should convert the rev/ min to rad/sec first and got 2303.8 rad/sec and then I used: change in angular velocity/ change in time and got 886.09 but when I input this answer, webassign (thats how we submit homework) says I'm wrong.... I don't know what else to try
     
  2. jcsd
  3. Nov 2, 2009 #2

    hage567

    User Avatar
    Homework Helper

    Are you using 2.9 s for your time? Check your division.
     
  4. Nov 2, 2009 #3
    Ahh Geez... thanks I was going crazy
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Angular acceleration of a drill
  1. Angular acceleration (Replies: 1)

  2. Angular acceleration! (Replies: 2)

Loading...