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: Speed and Velocity of a clock

  1. Sep 20, 2011 #1
    1. The problem statement, all variables and given/known data

    The sweep second hand of a clock has a length of 2.0 cm.

    2. Relevant equations

    a) What is the speed of the sweep second hand tip at the 6 o'clock position?
    b) What is the velocity of the sweep second hand tip at the 6 o'clock position?

    3. The attempt at a solution
    I don't really understand how to use 2.0 cm to solve the problem. Do you figure out the length it takes for the second hand to reach 6 o'clock and divided 2.0 cm by the answer?
  2. jcsd
  3. Sep 20, 2011 #2


    User Avatar
    Homework Helper

    In one minute, the tip of the hand will sweep out a circle of radius 2 cm. What is the circumference of that circle? What speed in m/s does this motion thus represent?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook