1. The Simple Pendulum A Classic Case Study New Core Curriculum: Foundations of Scientific Process

2.  Mechanical energy  Chemical energy  Radiant energy  Electrical energy  Nuclear energy Various Forms of Energies Let’s review from last time….

3. Forms of Energy Nuclear Electrical Radiant Chemical Mechanical Heat Engine Friction Electolysis, charging storage battery Battery, Fuel Cell Oxidation Photosynthesis Electric Motor Electric Generator Gamma Fusion Solar cell Light- bulb Friction, burning Heat engines

4. ENERGY = WORK + HEAT In colloquial language, ENERGY is equated with vigor, liveliness and vitality In science, ENERGY is defined as the ability to do work and transfer heat Don’t Confuse Power, Work & Energy…

5. WORK  not concerned with a nature of the task, tiredness, etc.  defined as force acting through certain distance units: Joules, calories (cal), nutritional Calorie (kcal) Don’t Confuse Power, Work & Energy…

6. HEAT  energy of atomic / molecular motion  this energy always flows from warmer to cooler object units: Joules, calories (cal), nutritional Calorie (kcal) Don’t Confuse Power, Work & Energy…

7. POWER P = W / t  work being done in a certain time frame units: [J/s = Watts, horse power: 1 hp = 746 W] Don’t Confuse Power, Work & Energy…

8. Energy Can Be Classified As Kinetic (KE) or Potential (PE) Energy PE can be converted to KE and KE can be converted to PE E total = KE + PE

9. Activity: The Simple Pendulum A Hands-on Case Study

13. The Period vs. Angle

14. Relative Masses of the Bobs Cork16gChrome66 g Wood58 gBrass72 g Aluminum26 gSteel95 g