 Grab a sheet off the middle stool. Best Hockey HitsBest Hockey Hits… On a piece of paper in your notes, write down as many vocabulary terms about.

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Presentation transcript:

 Grab a sheet off the middle stool.

Best Hockey HitsBest Hockey Hits… On a piece of paper in your notes, write down as many vocabulary terms about energy that you can that you see in the video. Try and remember from what you have learned in the past….

Energy is ability to do work. Work is exerting force (F) over a distance (d) W = F X d Force (F) is a push or pull

 Law # 1: Law of Conservation of Energy Energy can be changed from one form to another, but cannot be created or destroyed.

Energy of motion Why is this type of hit particularly dangerous? OUCH !!!!!!!!!!

Stored Energy! Stored in 3 ways: Gravitational- stored energy from object held above the ground Chemical- stored energy in bonds of a substance. Elastic- stored energy in a stretched substance.

Balloon letting loose Isopropyl Alcohol Ball toss

Watch the ball closely What energy transformations are taking place? What else is going on here that has to do with energy?

Law # 2: Law of Entropy in a System Energy goes from a more usable form (high quality) to a less usable form (low quality) High quality  Solar Low quality  Heat Heat is considered lower energy, it cannot be reused to do work as efficiently. Energy is NOT DESTROYED, ONLY WASTED

I KNOW YOU SAW SOMETHING LIKE THIS IN MIDDLE SCHOOL! But now I want you to analyze it in a new way. How does this relate to the 1 st Law of Thermodynamics (Conservation of Energy)? What energy transformations are taking place? How does this relate to the 2 nd Law of Thermodynamics?

What energy transformations takes place?