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Dot Physics

Category archives for graph

I don’t really know what that title actually means. So, I have been having problems with my PASCO projectile launcher devices. I will just call them launchers (they are really cannons). In my previous post, I looked at the launch speed from a launcher shot horizontally and vertically. The problem was that I was getting…

If you didn’t catch the latest MythBusters (yeah! new episodes), they did something straight from the physics textbooks. Just about every text has this example of shooting a bullet horizontally and dropping a bullet from the same height. The idea is that they should hit the ground at the same time. No one but the…

Momentum and Football

I think we are entering a new era. An era where it is quite simple to find and get great videos. Oh, just saw a great tackle on the TV? In the old days, you would have to get that video off the TV yourself. Not anymore. Welcome to the interwebs. Also, the quality is…

Plotting with VPython and PyLab

I am not a programmer. Just to be clear. I use python to get things done, but I am sure it could be done in more efficient ways. Anyway, I sure you know how much I like vpython – especially for teaching physics. However, sometimes I use it for blogging stuff also. The problem is…

Elephants can’t jump. Really.

Sciencegeekgirl is blogging from the AAPT. She talks about showing something interesting to get students thinking, and here is her example: This reminds me of Dan Meyer’s What Can You Do With This stuff. Anyway, I can’t help it. I must analyze this video. Plus, Fran essentially threw down the gauntlet and called me out…

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…

Here is another one from a great podcast – Buzz Out Loud. I totally can’t remember which episode it was, I listened to a several in a row mowing the lawn and doing outside type work. Anyway, the discuss was along the lines of: Could an iphone tell if your parachute didn’t open with its…

Analysis of Dan Meyer’s photo.

Dan Meyer made this awesome photo. He posted it so that others could look at it and come up with lesson ideas to use with this. There are some very good suggestions in his comments. I wasn’t going to analyze this because I didn’t want to rob some students of the opportunity, but I can’t…

I just got back from judging elementary level science fair (this is like kids in 6th grade or something). Here are some quick notes in no particular order. Please, please do not have a 20 item list of supplies that you used on your board including things like thumb tacks, tape, paper and poster board.…

The price of a piece of LEGO

This idea comes from my friend Thomas. His son is like mine in that they both think LEGO are awesome, and they are correct. For some reason, Thomas decided to calculate the price per piece of LEGO in each set. To promote repeatability, I decided to do this also. Looking at the catalog at LEGO.com,…