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A special vehicle for traveling on glacial ice has tires that are 4.8 ft in diameter. If the vehicle travels at 3.5 mi/h, what is the angular velocity (in r/min) of the tire?
Using quantitative analysis method:
(3.5 mi/hr)*(rev/4.8π ft)*(2π rad/rev*(5280 ft/mi)*(hr/60min)
all units and π cancel out except rad/min
=128.33 rad/min (ans)
factors (ratios) used: