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: Initial velocity of rolling ball

  1. Jan 25, 2007 #1
    A rolling ball has an initial velocity of -1.5 m/s .

    a. if the ball has constant acceleration of -0.23 m/s^2, what is its velocity after 2.2 s?

    V = vo + at = -1.5
    -0.23 * 2.2 = -1.5 - 0.506 = -2.006 = -2.0 m/s
    answer is -2.0 m/s

    b. what was its average velocity during that time interval?
    Vav = ( -2.0 - 1.5)/2 = -1.75 m/s
    answer is -1.75 m/s

    c. How far did it travel in this time interval?
    D = VoxT + at^(2/2) = -1.5 * 2.2 - (0.23 * 2.2^2)/2 = -3.3 - 0.56 = -3.86
    answer is -3.86
     
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted