inertia

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Many textbooks are pumped up about Newton’s 3 laws of motion. For me, not so much. First, (as many other’s point out) these are really Newton’s ideas about force. Second, the first law is pretty much a special case of the second law. Here are the first two laws (in my words): Newton’s First Law:…

A physics question. Answer quick!

I have always wanted to ask a question like this – but never found the right test for it. Perfect for a blog. Question: Suppose you are in your car at a stop light behind a truck. The truck is pulling a trailer with a rollable tractor on it. When the light turns green, the…

Dear Ruff Ruffman, My kids really like your show. However, there is a problem. You promote it like it is science, but the content keeps having mistakes in it. Previously, I pointed out your mistake about in infrared thermometer (if can’t remember, you said the thermometer measures the temperature with a laser. In fact, the…

Better technology sometimes causes problems. In this case, technology has made video cameras really small. Small? That’s a problem? Well, the problem (as I discussed previously) is that small cameras are not stable and make “shaky” videos. Well, then increase the mass of the camera – simple. I wanted to test this idea and make…

First, I think we should all be using smaller lighter cars. They get better gas mileage, they are better for the environment and maybe even reduce traffic? (ok, not sure about that last one – but it is possible). In Buzz Out Loud 918, they were discussing Toyota working on new car bodies built from…

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…