1
answer
0
watching
270
views
27 Nov 2019
The drill used by most dentists today is powered by a small airturbine that can operate at angular speeds of 3.67 Ã 10^4 rad/s(about 350,000 revolutions per minute). These drills, along withultrasonic dental drills, are the fastest turbines in the world âfar exceeding the angular speeds of jet engines. Suppose a drillstarts from rest and comes up to its operating speed in 1.8s.
a. Find the angular acceleration produced by the drill, assuming itis constant.
b. How many revolutions does the drill bit make as it comes up tospeed?
The drill used by most dentists today is powered by a small airturbine that can operate at angular speeds of 3.67 Ã 10^4 rad/s(about 350,000 revolutions per minute). These drills, along withultrasonic dental drills, are the fastest turbines in the world âfar exceeding the angular speeds of jet engines. Suppose a drillstarts from rest and comes up to its operating speed in 1.8s.
a. Find the angular acceleration produced by the drill, assuming itis constant.
b. How many revolutions does the drill bit make as it comes up tospeed?
Elin HesselLv2
26 Sep 2019
