2-17-09

DQ

The Conservation of Energy

Practice


 * DQ**: Kinetic energy is an active or moving form of mechanical energy. Does an object need to be stationary to have potential energy? No, because potential energy doesn't change into kinetic energy right away.


 * Notes**

__Conservation of Energy__

E(tot) never changes in a system: E(tot)=E(p) + E(k) E(p) + E(k)= E(p) + E(k)

To prove the point Mr. Manning used a bowling ball suspended from the ceiling. He sends the ball on a curved path and we watched as it rose to the same height at which he released it from. To show us that this was no trick, Mr. Manning placed his face in the balls path knowing that the ball will reach the same height at which he released it, which was lower then the height of his face. With some disappointment from several students the ball did not smash Mr. Manning face, proving his point.

After Donnell rattled off some interested facts on Strasburg Rail Road's number 90. Mr. Manning then showed us Donnell's and Mike's I wasn't speeding project, which was awesome. The editing was nice and tight and the music went along with the video well. According to the director, Donnell Allen, the kid riding the bike was arrested yesterday for stealing from a local Turkey Hill. Then Moyo and Matt read Taylor's poem about the I Wasn't speeding project. From both projects the person wasn't speeding and the biker was off. After we saw some of the projects we worked on our homework. The homework is due Wednesday and if anyone didn't hand in their project, then they can hand it in tomorrow for five points off.