Results 1 to 3 of 3

Math Help - Finding ball velocity using time

  1. #1
    Senior Member vaironxxrd's Avatar
    Joined
    Nov 2010
    From
    USA
    Posts
    424
    Thanks
    1
    Awards
    1

    Finding ball velocity using time

    Hello forum, vaironxxrd here.

    I had a lab which was pretty interesting to me and fun. The teacher made a ball roll from 0-20cm 5 times and then 0-40cm 5 times, and so on until the distance was 120cm.

    We had 5 trials for each distance. Now I have to figure out the average and final velocity for each trial on each distance.

    Just to know that I'm doing this right can someone check one of my examples?

    First trial for 0-20cm.
    Time = .97s

    Therefore, The final velocity should be \frac{20cm}{.97s} which is 20.62\frac{cm}{s}

    Therefore the average velocity should be Finalvelocity/2

    Average velocity = 10.31\frac{cm}{s}
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,621
    Thanks
    426

    Re: Finding ball velocity using time

    try again ...

    \frac{\Delta x}{\Delta t} = \frac{20 \, cm}{0.97 \, s} = v_{avg}

    for constant acceleration ...

    v_{avg} = \frac{v_0 + v_f}{2}

    since the ball starts from rest ...

    v_{avg}= \frac{0 + v_f}{2}

    2v_{avg} = v_f
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member vaironxxrd's Avatar
    Joined
    Nov 2010
    From
    USA
    Posts
    424
    Thanks
    1
    Awards
    1

    Re: Finding ball velocity using time

    Quote Originally Posted by skeeter View Post
    try again ...

    \frac{\Delta x}{\Delta t} = \frac{20 \, cm}{0.97 \, s} = v_{avg}

    for constant acceleration ...

    v_{avg} = \frac{v_0 + v_f}{2}

    since the ball starts from rest ...

    v_{avg}= \frac{0 + v_f}{2}

    2v_{avg} = v_f
    Thanks allot skeeter.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: December 6th 2010, 02:52 AM
  2. Finding time given accelration & velocity
    Posted in the Calculus Forum
    Replies: 1
    Last Post: July 29th 2010, 12:17 PM
  3. Finding Velocity, time, distance
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: March 22nd 2010, 09:59 AM
  4. Velocity of a Ball
    Posted in the Calculus Forum
    Replies: 5
    Last Post: January 21st 2008, 09:13 PM
  5. Replies: 6
    Last Post: August 28th 2007, 07:41 AM

Search Tags


/mathhelpforum @mathhelpforum