# Newton and small video cameras

Just to be clear, Newton probably didn’t have a portable video camera. I do. I have one of these Flip Mino pocket cameras. Very nice. You can put it in your pocket. However, there is a problem with cameras like these (think of video from camera phones). The problem is the mass, it is too…

# Throwing a football, Part II

In part I of this post, I talked about the basics of projectile motion with no air resistance. Also in that post, I showed that (without air resistance) the angle to throw a ball for maximum range is 45 degrees. When throwing a football, there is some air resistance this means that 45 degree is…

# What angle should you throw a football for maximum range?

College football season is coming to an end (I guess technically, the season is over – it is bowl season). Anyway, this is something I wanted to do a long time ago, but I kept getting side tracked. If I don’t do it now, I will never do it. Most people know that a ball…

# Curse my slow fingers! Someone else did the Kirk-car thing

Clearly, I am not a professional blogger. I am an amateur. This is because I was under the impression that only amateur bloggers could compete in the blogging olympics. When did they change these rules? Anyway, Adam Weiner did a physics-based analysis of the latest Star Trek movie trailer. Here is the trailer: In the…

# Gas + Fire + Basketball + Newton = bad idea

First, don’t play with fire. Fire is dangerous. You can get hurt. Here is a video of two guys trying to (presumably) make the Miami Heat flaming basketball. Note: the above is just a picture link to the actual movie. Embedding the movie was doing some weird stuff. In the movie, two guys pour gasoline…

# Time Warp Samurai guy – waves of kinetic energy?

I am sure I have mentioned the Discovery show Time Warp before. The basic idea of the show is to find how many cool things they can look at with an ultra slow motion video camera (btw – this is on my christmas list). So, I have seen this Samurai guy on the show twice.…

# Wikipedia – source for future blog posts

I have been searching for where I found this link, if it was your blog please forgive me for not linking. Here is a link to Common misconceptions in science from wikipedia. Looks fun. Really, I am just posting this so I won’t forget to come back to it sometime.

# CD Players in space and rotations of a rigid body

I saw this video on several places. It shows an astronaut playing with a CD player. I wish I were an astronaut. I would probably not stop throwing up though. It would still be worth it. You can only throw up so much right? (I know the answer to this question). Anyway, this is a…

# DWFTTW – The saga continues.

Wow. I wrote a post about Directly Down Wind Faster Than The Wind (DWFTTW) vehicles. At the time of this post, there are 37 comments for the original post. That is way more than I expected. This is very popular topic. Clearly, it brings a lot attention to Dot Physics. The first question – is…

# Poof! A textbook.

Maybe you have seen some of my posts on basic topics. One of the original ideas I had for creating the “basics” posts was so that I would not need to keep repeatedly explaining what the fundamental physics concepts were for each post. I can only explain the work-energy principle so many times before I…