9th Physical Science

Week of Nov 16th – Nov 20th

Introduction: Simple Machines – Mechanical Advantage – WorkWorksheet: Mechanical Advantage of Simple Machines

• 8:05 – 10:35/10:40 -- Testing in West Gym•10:45 – 11:15 -- Lunch (SW Cafeteria) •11:15 – 2:00/2:30 -- Team Activities (Off site)

Introduction: Energy & Conservation of EnergyWorksheet: Potential & Kinetic Energy

Introduction: Efficiency & PowerWorksheets: Efficiency and Energy - James Prescott Joule (Homework)

Worksheet: Work Worksheet: Power

LEARNING TARGETS• I can identify examples of simple machines.• I can evaluate the mechanical advantaged of simple

machines.• I can tell what it means to “do work” in a scientific sense.• I can describe how energy changes as systems change.• I can discuss examples of energy transformation.• I can explore energy involved in carrying out daily activities.• I can describe relationship between work and power.• I can apply a rule to determine the amount of power needed

to do work.• I can explore the meaning of efficiency in terms of input and

output of work.

• Next Quiz / Test: Tuesday November 24th • It will cover: Chapter 7, • You will need to know: Simple machines–Mechanical Advantage [MA = Fo / Fi MA = Li / Lo

MA = Length / Height]

–Work [W = F ˙ d]

– Energy [chemical, radiant, nuclear, and mechanical]• Potential Energy [PE = mgh]• Kinetic Energy [KE = ½ mv2]

– Law of Conservation of Energy [Unit of energy – Joule]

– Power [P = W/t] - [Unit of power – Watt or Horsepower]

– Efficiency [Eff = Output Work / Input Work]