Question

The drill used by most dentists today is powered by a small air-turbine that can operate at angular speeds of 350000 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 2.2 s .

1.Find the angular acceleration produced by the drill, assuming it to be constant.

Express your answer using two significant figures.

2.How many revolutions does the drill bit make as it comes up to speed?

Express your answer using two significant figures.

Answer #1

The drill used by most dentists today is powered by a small
air-turbine that can operate at angular speeds of 350000 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 2.0 s . You may want to review (Pages 305 - 307) .
Part A
Find the angular acceleration produced by the drill, assuming...

The drill used by most dentists today is powered by a small
air-turbine that can operate at angular speeds of 350000 rpmrpm.
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 2.0 ss .
Find the angular acceleration produced by the drill, assuming it
to be constant.
How many revolutions does the drill bit...

1. A dentist using a dental drill brings it from rest to maximum
operating speed of 364,000 rpm in 3.2 s. Assume that the drill
accelerates at a constant rate during this time.
(a) What is the angular acceleration of the drill in
rev/s2?
rev/s2
(b) Find the number of revolutions the drill bit makes during
the 3.2 s time interval.
rev
2. In a laundromat, during the spin-dry cycle of a washer, the
rotating tub goes from rest to...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 18 minutes ago

asked 29 minutes ago

asked 30 minutes ago

asked 47 minutes ago

asked 48 minutes ago

asked 52 minutes ago

asked 54 minutes ago

asked 54 minutes ago

asked 54 minutes ago

asked 56 minutes ago

asked 59 minutes ago

asked 1 hour ago