A fl oor polisher has a rotating disk that has a 15-cm
Chapter , Problem 10(choose chapter or problem)
A fl oor polisher has a rotating disk that has a 15-cm radius. The disk rotates at a constant angular velocity of 1.4 rev/s and is covered with a soft material that does the polishing. An operator holds the polisher in one place for 45 s, in order to buff an especially scuff ed area of the fl oor. How far (in meters) does a spot on the outer edge of the disk move during this time?
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