Apologia Physics and Physical Science: Center of Gravity

Yesterday, the Physics class worked on vector addition.  But, I like to have a hands-on activity just about every class.  So, I brought in my Bottle Balancer, which demonstrated center of gravity.  As you can see here the guys balance the bottle immediately.  Want more?  A classic example for demonstrating center of gravity is a sky hook.  Another favorite is the balancing bird.  The Exploratorium even has teacher instructions using clay and a meter stick.  Let's round out this post with one last center of gravity hands-on activity from Educational Innovations.  Take a look at the ideas using craft sticks.