Dance Showcase

Last night, I went to dance showcase, so that's what I decided to write my blog about. Sorry about all of the heads. This is a video of a hula that uses pu`ili. There is so much physics in dance, but I'll just mention a couple concepts. As you can see, there are a lot of turns in this particular dance. The friction between the dancers' feet and the ground allows the dancers to pivot and turn. If there was no friction, their feet would just slip and they wouldn't be able to pivot. In this dance, the dancers also tap themselves with their pu`ili and tap their pu`ili against each other. They don't want to hit themselves too hard, so they have to make sure that they don't apply too much force!

This is a video of two of my friends chanting. It is really short because my camera ran out of memory :( Anyway, as we are just beginning our study of oscillations and harmonic motion, this video becomes more relevant. The sound of their voices travels in waves across the gym. My friend Pua, who is on the left, has a higher voice than my friend Daiva, who is on the right. This means that the sound waves the Pua produces have a higher frequency than the sound waves that Daiva produces. However, in this case, their frequencies should be the same since they are theoretically chanting at the same pitch. In the first video, you can also hear the music that the dancers are dancing to. My friends would both kill me if they knew I was using these videos for my blog :)