Dot Physics

Another Video Analysis Tutorial

I made this screen cast for my algebra-based lab. Maybe you will find it useful also. This is a tutorial using Tracker Video Analysis (an awesome free program as I have said many times). In this tutorial I analyze a moving cart that shoots a ball up and lands back in the moving cart (called a Howitzer cart). The video is available at the LivePhoto Physics site.

Comments

  1. #1 Joss Ives
    July 27, 2009

    Rhett (and others). Do you have any suggestions for video cameras that are reasonably priced (few hundred dollars max) for doing video capture of the normal motion we would see in mechanics labs and demos.

  2. #2 Rhett
    July 27, 2009

    Joss,

    I have been meaning to post something about this for some time, but it keeps not getting posted. I have some data that I took with 4 different video cameras for analysis – a cell phone video, a flip mino HD ($200), a still camera video, and a miniDV camera. All but the miniDV are relatively cheap. They all did a reasonably good job except for the cell phone.

    I will try to get this posted soon as a I know it will be helpful.

    My personal recommendation is the FLIP – great, cheap camera.

  3. #3 Joss Ives
    August 7, 2009

    Thanks Rhett. Is the shutter speed fast enough to minimize object blur when you take video of an object dropping from 9-10 feet?

  4. #4 Rhett
    August 7, 2009

    @Joss,

    This should be ok with just about any camera. One thing that will make it even better is if you throw the ball up 10 feet instead of dropping it 10 feet. This will give you plenty of time at the highest point of motion where the ball is not moving very fast.

  5. #5 Joss Ives
    August 9, 2009

    Rhett,

    Thanks for the tip on the full motion of the ball instead of just the drop.

    The reason I asked about the shutter speed is that I have a friend that recommended the Kodak Zi6 (which is 60 fps instead of 30fps for the flip), but he said that due to a lack of shutter speed control, things got pretty blurry past the 6ft point for a dropped object.

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