Download Standards S8P3c. Demonstrate the effect of simple machines (lever

Lifting the Refrigerator Problem
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STANDARDS
S8P3. . Demonstrate the effect of simple
machines (lever, inclined plane, pulley,
wedge, screw, and wheel and axle) on work.
SPS8. Students will determine relationships
among force, mass, and motion.
e. Calculate amounts of work and mechanical
advantage using simple machines
High School
A previous customer had you move a
refrigerator into their home. Now, that
same customer is moving and needs you to
move this same refrigerator, weighing
1000N, into their new home. The house sits
two meters off the ground for flood
insurance purposes and is only accessible
by stairs. OSHA requires that the
maximum force exerted by a worker cannot
exceed 200N.
Your task is to investigate simple and
compound machines and determine the
advantages and disadvantages of each as a
method of getting the refrigerator up those
steps! Then, you must present three
options to your customer and recommend
the best solution.
You
Solution
You are to present your solution in the form of a
trifold pamphlet outlining the advantages and
disadvantages of each machine as a solution to
getting the refrigerator up the steps. You must
then recommend the solution that you deem the
best.
You will investigate :
 Work
 Mechanical advantage
 Mechanical efficiency
 Power
As they relate to:
 inclined planes
 Levers
 Pulleys
 Wheel & axle
 Screws
 Compound machines
Process