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Physical Science with Earth and Science
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Efficiency and Energy Loss
Worksheet
Grade Level
Physical Science with Earth and Science
9.58 Efficiency and Energy Loss
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A class wants to compare the efficiency of two pulley designs. Which testing plan best supports a fair comparison?
A
Choose the pulley that looks smoother without measuring energy.
B
Use the same load and input method, then measure input work and useful lifting work for each design.
C
Measure only the color and mass of the ropes.
D
Test one pulley indoors and the other outdoors with different loads.
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