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OpenStudy (anonymous):
To lift a load to the roof, you apply 21 N of force to a pulley. The pulley applies 21 N force to the load. What is the mechanical advantage of the pulley?
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OpenStudy (anonymous):
increasing the slope of the ramp Reducing the friction between the wagon wheels reducing the length of the wagon wheels increasing the friction between the wagon wheels
OpenStudy (anonymous):
what do you think?
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