(b) How many rotations does the wheel make before coming to rest ? (7)
The flywheel of a steam
engine runs with a constant angular speed of 72 rev/min. When the
steam
is
shut
off, the friction of the bearings and the air brings the wheel to
rest
in 2 minutes.
(a) What is the constant angular
acceleration,
in rev/s, of the wheel during slowdown ?
(7)
(b) How many rotations does the wheel make
before
coming to rest ?
(7)
(c) What is the tangential component of the
linear
acceleration of a particle that is 10 cm from
the
axis of
rotation when the flywheel is turning at (6/(2)) rev/min ?
(4)
Tangential
component
of acceleration depends only on the angular acceleration and the
radius, r.
It is
independent of the instantaneous angular velocity.
(d) What is the magnitude of the net linear
acceleration
of the particle in (c) ?
(7)
where aT
is given by (c) and,
