1. Ryan Cates University of South Florida Big Idea 11: Energy Transfer and Transformation

2. Vocabulary Review  Conductivity  Insulator  Magnets have north and south ______?  Name 3 types of potential energy  Definition: The energy of motion.  Mass

3. Forces and changes in motion *VOCABULARY*  Force – A push or pull on an object.  Some forces act through physical contact while others act from a distance.  Weight – The force (pull) that gravity puts on mass. Calculated by mass* the gravity constant.  Gravity – A force of attraction the earth has terrestrial bodies.

4. Weight is different on other planets  Weight = Mass x Gravitational Constant  Gravitational Constant = 32.2 ft/s 2 PlanetWeightMass Earth1604.97 Mercury60.44.97 Venus145.14.97 The Moon26.54.97 Mars60.34.97 Jupiter378.24.97 Saturn170.24.97 http://www.exploratorium.edu/ronh/weight/

5. Newton’s first law  An object that is in motion will stay in motion or an object at rest will stay at rest until acted upon by another force.