Asked by sara
A metal bar with a radius of 7 inches is being ground in a lathe. the surface speed of the bar is 5 ft/min. how many revolutions will the bar make in 31 seconds
Answers
Answered by
oobleck
31s * 1min/60s * 5ft/1min * 1rev/(14πin * 1ft/12in) = ___ rev
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