The drill used by most dentists today ispowered by a small air turbine that can operate at angular speedsof 350,000 rpm. These drills, along with ultrasonic dental drills,are the fastest turbines in the world—far exceeding the angularspeeds of jet engines. Suppose a drill starts at rest and comes upto operating speed in 2.1 s. (a) Find the angular acceleration produced by the drill, assuming it to be constant. (b) How many revolutions does the drill bit make as it comes up to speed?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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The drill used by most dentists today is
powered by a small air turbine that can operate at angular speeds
of 350,000 rpm. These drills, along with ultrasonic dental drills,
are the fastest turbines in the world—far exceeding the angular
speeds of jet engines. Suppose a drill starts at rest and comes up
to operating speed in 2.1 s. (a) Find the angular acceleration produced by the drill, assuming it to be constant. (b) How many revolutions does the drill bit make as it comes up to speed?

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