Sunday, November 23, 2008

kay...so this evening my dad and me decided to do my physics journal...lol
so we decided that we should do a belly bump (or should i say Ab collision). so first to make it interesting we weighed ourselves on my scale. you may not be able to see it that well but my dad weighs 143 pounds and i weigh 131.6 pounds. then we lined up, my mom focused the camera and we jumped into the air thrusting our bellies(abs) into each other. it was a success!! and it was supper funny!! but i saw that my dad moved backwards as i moved forward. this is related to physics b/c of momentum and impulse. our momentums were obviously different
b/c my dad went back as i went forward but our impulses were the same...even tho i had a smaller mass than my dad, my velocity was greater causing me to have a bigger momentum. P= m x V thats why
if i had a bigger velocity but a small mass i was able to counter act my dads bigger mass and smaller velocity. THIS LAB WAS FUNNY...

Sunday, November 2, 2008


This summer my friends and I went to maunawili falls in Kailua. This is a natural water fall where you can jump off into a pretty deep pond. First we had to hike into the trail and finally we found it by following the stream up the mountain. It was tons of fun. Okay so when you get there you can jump off from different heights ranging from 40 to 10 feet. I went to the top one. When i was standing on the rocks i had all potential energy and no kinetic energy. Once my foot left the cliff and i jumped out toward the pond i began to lose potential energy and gain kinetic energy. there was no energy lost but it was being transfered from potential to kinetic energy. The equation for kinetic energy is KE=1/2mv^2 and the equation for potential energy is PE=mgh.