Tuesday, December 11, 2007


Okay, so my house doesn't actually have yellow walls and orange carpeting, but i couldn't find the right colors on paint. Anyway, since we are learning about torques now, i began to notice naturally occurring torques in my house. I was lying down diligently studying from my US history book when my little sister and my dad walked into the room. My dad went to the window to open the blinds and let light in. It just so happened that at the same time, i was turning a page in my book and my sister left the room again (plus, the fan was on). In that instant, there were five torques being exerted on different objects. The chain my dad was pulling to open the blinds exerts a torque on each individual vinyl panel that makes it rotate, letting light into the room. My sister exerts a torque on the doorknob to turn it and a torque on the door itself to close it behind her. The fan exerts a torque on each of its blades to rotate them, and finally, i exert a torque on the page of my book to turn it. fin.

Sunday, December 2, 2007


The other day i was riding my bike down to my friend's house to watch the UH football game. When i rode my bike down the street the road was dry and the sun was out. By the time the game was over, however, the sun was down and the road was wet with rainwater. As i was headed home i didnt see a big puddle of water in the middle of the street. I rode right through it and to my surprise my back felt wet through my tshirt. When i got home, i looked in the mirror at the back of my shirt and there was a fat line of water going up my spine. The water flicked off my back tire and up onto the back of my shirt. This made me think about what Mr. Kohara said in class. The water could not stay on the tire because a sufficient amount of friction did not exist to hold the water onto the tire. Therefore, the water shot off tangent to the tire and landed on my back. If i rode through the puddle more slowly, however, the water would not have flicked up onto my back because of two reasons: 1. the amount of centripetal force needed to keep the water on would be less because of a slower speed and 2. more water will have fallen off the tire before it could get up to my back.