Download Work and Energy

Work and Energy
How do simple machines work?
What are the consequences of multiplying forces in a machine?
How is motion on a track related to energy?
Engage Activities
Research Project Homework: Students write a 1-2 page proposal on how they plan to collect and analyze
data for their research project. Students need their proposal to be as detailed as possible and should include:
 materials list
 explain how data is collected (assign tasks for each student in group)
 preliminary hypothesis
 preliminary data table using hypothetical data
 preliminary graphs using hypothetical data
 data interpretation
 conclusions (was hypothesis correct? Why or why not?)
Note: Students that do not have sufficient detail will have to rewrite their proposals.
Explore Activities
Students conduct CPO activities 10.1, 10.2, 10.3
Explain Activities
Vocabulary Building to include 4-square type vocabulary cards and word wall*: Machine, energy, gear, work,
level, potential energy, kinetic energy, chemical energy, mechanical energy, electrical energy, fulcrum, input
force, friction, radiant energy, joule, output force, pulleys, mechanical system, nuclear energy, pressure
energy, thermal energy, closed system, simple machine, mechanical advantage, conservation of energy
Elaborate Activities
Research Project Data Collection: Students must bring their own materials if teacher does not have it (e.g.
football, frisbee, yo-yo, etc.) and collect data in small groups. Most data can be collected with a CBL unit with
motion detector or use stop watch and measuring tape. Collect data for 6-8 students per day and check to
make sure each student has usable data.
Evaluate
 See test bank for unit assessment
Ch. 10 M.C. (30 questions), Ch. 11 M.C. (30 questions), and Ch. 12 M.C. (30 questions)
Unit Resources:
CPO activities 10.1Ultimate pulleys set
Physics stand
Scale
Spring scale
Metric rules
CPO activities 10.2Ultimate pulleys set
Physics stand
Spring scale
Metric rules, Meter stick, Metric measuring tape
CPO activities 10.3Loop track
Physics stand
Meter stick
Graph paper
Steel and plastic balls
Timer IIe
Photogate
Technology links: None
Energy Flow and Power
How efficient is the straight track?
How powerful are you?
Where did the energy go?
Engage Activities
Explore Activities
Explain Activities
Elaborate Activities
Evaluate
Students conduct CPO stair climbing activity 11.2
Students conduct CPO activities 11.1, 11.3
Vocabulary Building to include 4-square type vocabulary cards and word wall*: Efficiency, reversible, energy
flow, herbivore, steady state, process, irreversible, watt, carnivore, ecosystem, input, power, cycle,
decomposer, output, horse power, food chain, food web, food calorie, producer, power transmission, energy
conservation.
Students create separate concepts maps relating physics conservation of energy to biology using the above
vocabulary. Students will first make a concept map of energy flow within the water cycle (use Fig. 11.16, p.
214 as guide) and make another detailed concept map for energy flow through an ecosystem ( use Fig.
11.18, p. 215 as guide).
 See test bank for unit assessment
Ch. 10 M.C. (30 questions), Ch. 11 M.C. (30 questions), and Ch. 12 M.C. (30 questions)
Unit Resources:
CPO activities 11.1Straight track
Physics stand
Steel and plastic balls
Timer IIe
Photogate
Scale
CPO activities 11.2Timer or stopwatch
Meter stick
Heavy object for lifting: small barbell, loaded backpack, brick, large book
Scale
Masking tape
Set of stairs
CPO activities 11.3No special equipment
Technology links: None
Momentum
What are the useful properties of momentum?
How are force and momentum related?
How does Newton’s first law apply to rotational motion?
Engage Activities
Car crash crime scene investigation/demo model: Discuss with students how physics is applied to car crash
investigations. Students predict outcomes of different crash scenarios (using toy vehicles of varying mass,
velocity and crash angles) and the teacher will demonstrate through modeling whether their predictions are
correct. Students will need to explain why or why not their predictions are correct.
Explore Activities
Students conduct CPO activities 12.1, 12.2, 12.3
Explain Activities
Elaborate Activities
Evaluate
Students create a energy and momentum Concept Map using these terms: work, mgh, Large k, stretchy
spring, area under graph, stored, inelastic collision, Hookes’ Law, slope, F/X, energy, elastic potential, Small
k, Ft, Mass x velocity, elastic collision, Kinetic, gradient, force X distance, Delta p, spring constant, Ns, joule,
gravitational potential, stiff spring, momentum, moving objects, and impulse
Special Research Project Data Analysis: Students enter their data in Excel spreadsheets and generate
graphs of their data. Schedule 2 days at computer lab and remind students to bring storage device to save
spreadsheets and graphs for their powerpoint presentations.
 See test bank for unit assessment
Ch. 10 M.C. (30 questions), Ch. 11 M.C. (30 questions), and Ch. 12 M.C. (30 questions)
Unit Resources:
CPO activities 12.1Colliding pendulum
Timer IIe
2 Photogates
Scale
CPO activities 12.2Physics stand
A rubber ball about 5 cm in diameter
A soft clay about 5 cm in diameter
A block of wood 5 X 10 X 25 cm
2 paper clips
2 meter piece of string
Meter stick
CPO activities 12.31 flexible straw
1 meter piece of string
2 washers
Technology links: None