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Motion of a Dart in Bloons

I stumbled on this flash game Bloons. The basic idea is that you (the monkey) throw these darts and try to pop some balloons. Well, what is the motion of these darts like? Is it constant acceleration? Time to pull out the free and awesome Tracker Video Analysis. I threw a few shots and captured…

One of my students showed me this game, Fantastic Contraption. The basic idea is to use a couple of different “machine” parts to build something that will move an object into a target area. Not a bad game. But what do I do when I look at a game? I think – hey! I wonder…

Atwood’s machine is the name of a device that looks like this: Also known as “two masses on a pulley”. Surprisingly, this simple device comes up a lot in intro physics texts. It also brings up some interesting issues. I will go over the basic way to solve a problem like this (as an example)…

Parameters for Fantastic Contraption

Yes, I did some experiments with [Fantastic Contraption](http://fantasticcontraption.com/) ([Water sticks in Fantastic Contraption](http://blog.dotphys.net/2008/10/water-stick-springs-in-fantastic-contraption-the-game/), [Torque from rotating balls in FC](http://blog.dotphys.net/2008/10/torque-produced-by-balls-in-fantastic-contraption/), [Basic stuff in FC](http://blog.dotphys.net/2008/10/physics-of-fantastic-contraption-i/)). But apparently, there is a wiki with some of the answers: [List of physics parameters for Fantastic Contraption](http://fc.therisenrealm.com/wiki/List_of_physics_parameters) I assume these are values from the actual program, not experimentally determined. (Thanks for…

Here is what is cool about [Fantastic Contraption](http://fantasticcontraption.com/) – it’s like a whole new world, a world ready for exploring. I am Newton, and I can see if this world follows the models that I propose. In this post, I am going to explore the elastic nature of the “water-sticks”. If you have played fantastic…

The fun part about exploring the physics of [Fantastic Contraption](http://fantasticcontraption.com/) is coming up with new setups to test ideas. Torque is not too difficult to set up. Here is what I did: ![Screenshot 04](http://scienceblogs.com/dotphysics/wp-content/uploads/2008/10/screenshot-041.jpg) In this setup, I have a “turning ball” with a wood stick attached to the side. I increased the length of…

Physics of Fantastic Contraption I

One of my students showed me this game, [Fantastic Contraption](http://fantasticcontraption.com/). The basic idea is to use a couple of different “machine” parts to build something that will move an object into a target area. Not a bad game. But what do I do when I look at a game? I think – hey! I wonder…

Force Rocket Game Level 2

Popular demand (from a few people – you know who you are) requested another level for the force game. I am open to naming this game. Ideas for levels have been suggested also. There is a new rule change. You must be stopped (or almost stopped) in the red circle. Learn more about this project…

A physics-based Scratch game

I already said I like [scratch from MIT](http://scratch.mit.edu). After building a simple rocket model, the kids said it should be a game. I caved. Here it is: Learn more about this project To play, press the space bar. The arrow keys are rocket thrusts. The goal is to get to the red circle in as…

I actually have some important things to do. However, I thought I would make another scratch program. Yes, this will all lead to something useful (that is what I told my wife). Anyway, in this program, I made a spaceship with 4 thrusters. The great thing about this is it show what forces do to…