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ICLE Standards:
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Physical Science: Develop an understanding of
power as the relationship between work and time.
Measurements: Make and use measurements to
describe and compare phenomena.
Functions: Represent and analyze relationships
using tables, equations and graphs.
Technology: Develop abilities in using a
computer to display and manipulate data.
Problem Solving: Recognizes problem and devises and implements a plan of
action.
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Performance Task:
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For this task, you will work in groups of
five. You will be determining the
horsepower expended as at least three team members perform a physical task
such as running or climbing stairs. You will compare your horsepower with
that of a machine of your choice.
You must devise a method of determining their combined horsepower
using a stopwatch, a bathroom scale and a meterstick. To accomplish this task, you will need
the following information:
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Power = Work / Time
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Work = Force (weight) x
Distance
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Standard units of measure: Force-newtons,
distance-meters, work-joules (Newton x meter),
time- seconds, power-watts (joule/seconds)
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1 pound = 4.45 Newtons
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1 horsepower = 760 watts
Your final report should include:
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The procedure you developed for
determining horsepower.
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A chart displaying the data from
the procedure
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A spreadsheet displaying the calculations you used to determine the horsepower of the team members.
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A valid conclusion.
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Compare your horsepower with
that of a machine of your choice (i.e. car, chain saw, etc.)
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Knowledge / Skills:
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Know and apply the principles of scientific
inquiry. (Implicit in this
statement are the processes of prediction, estimation, developing
hypotheses, drawing conclusions, evaluation, and following ethical
principles and professional procedures.)
S.114
Make observations using senses and instruments.
Inferences and interpretations are arrived at based on observations.
Classify observable properties and organize observations in a meaningful
and logical way. S.5
Measure properties of the environment using
dimensional quantities such as time, length, mass, pressure, volume,
acceleration, etc. Compare, estimate and predict measurements. S.23
Understand and apply statics (i.e., the relation
between forces acting on an object at rest) and dynamics (i.e., the
relation between the forces acting on an object and the resulting
motion). S.84
Use writing as a tool for learning in formats
such as learning logs, laboratory reports, note-taking, journals and
portfolios. ELA.40
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Rubric:
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4 POINTS: The report includes clear and concise
directions for replicating the physical task used to determine the
horsepower of the students. The task chosen is creative and original. The
report includes labeled charts that display the data including the proper
units of measure. The spreadsheet is set up accurately to perform the
necessary calculations. The conclusion is drawn accurately from the
data.
3 POINTS: The report includes clear directions for replicating the
physical task used to determine the horsepower of the students. The report includes charts displaying
the data. The spreadsheet is set up accurately to perform the necessary
calculations. The conclusion is accurate
2 POINTS: The report includes
incomplete directions for replicating the physical task used to determine
the horsepower of the students. The report includes charts displaying the
data. The spreadsheet is set up accurately to perform the necessary
calculations. The conclusion is adequate.
1 POINT: The report is lacking one of the following: directions for
replicating the physical task used to determine the horsepower of the
students, charts displaying the data, or the spreadsheet used to perform
the necessary calculations. Little
effort was made to complete the task. The conclusion is missing.
0
POINTS: The report is lacking two
of the following: directions for replicating the physical task used to
determine the horsepower of the students, charts displaying the data, or
the spreadsheet used to perform the necessary calculations. No effort was made to complete the task.
No conclusion.
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