Scribe

Hello everybody!

Today was the day we learned about energy! But before that we just went over a bunch of problems relating to work. Just gotta remember:
Work = Force * Distance
Work = Force * Cos theta * distance
(the Cosine theta find the component of the force that lines up with the distance)

Then we moved onto the video lesson, which summed up kinda goes like this:
- Review of Ft = momentum
- Then we learned that Fd = Energy or work = energy
- Energy comes in many many many forms electricity and light to name a couple
- From there it moved onto Kinetic and Potential energy
-Kinetic energy is the energy of motion
-Potential energy is stored energy
-They are related, when potential energy is transformed into motional energy the total energy stays the same by the law of conservation, so if 5J of PE is transformed into Kinetic energy there will still be 5J of energy in the system (assuming that which is transferred to the surroundings is negligible)
-Then with a brilliant demonstration on pulleys he showed us how each rope takes some tension force but the person would still have to exert the same amount of energy to move the object because they would have to pull a larger distance.

That pretty much sums up the class...
The next scribe will be KIM