Question

A flywheel turns through 34 rev as it slows from an angular speed of 5.1 rad/s to a stop. (a) Assuming a constant angular acceleration, find the time for it to come to rest. (b) What is its angular acceleration? (c) How much time is required for it to complete the first 17 of the 34 revolutions?

Answer #1

A flywheel turns through 34 rev as it slows from an angular
speed of 7.9 rad/s to a stop. (a) Assuming a
constant angular acceleration, find the time for it to come to
rest. (b) What is its angular acceleration?
(c) How much time is required for it to complete
the first 17 of the 34 revolutions?

A
flywheel turns through 40 revs as it slows from an angular speed of
1.5 rad / s to a stop. (a) Assuming a constant angular
acceleration, find the time for it to come to rest. (b) What is its
angular acceleration? (c) How much time is required for it to
complete the first 20 of the 40 revolutions?

A flywheel slows from 655 to 400 rev/min while rotating through
20 revolutions.
What is the (constant) angular acceleration of the
flywheel?
α=α= rad/s2
How much time elapses during the 20 revolutions?
t=t= s
Calculate the rotational kinetic energy of a 13-kg motorcycle
wheel if its angular velocity is 141 rad/s and its inner radius is
0.280 m and outer radius 0.330 m.
KErot = J

A flywheel having constant angular acceleration requires 4.60 s
to rotate through 167 rad . Its angular velocity at the end of this
time is 102 rad/s . Find the angular velocity at the beginning of
the 4.60 s interval and the angular acceleration of the
flywheel.
PART A
Find the angular velocity at the beginning of the 4.60 s
interval
W0= ? rad/s
PART B
the angular acceleration of the flywheel
a=?
rad/s2

A flywheel with a diameter of 2.38 m is rotating at an angular
speed of 121 rev/min. (a) What is the angular
speed of the flywheel in radians per second? (b)
What is the linear speed of a point on the rim of the flywheel?
(c) What constant angular acceleration (in
revolutions per minute-squared) will increase the wheel's angular
speed to 933 rev/min in 71.7 s? (d) How many
revolutions does the wheel make during that 71.7 s?

A flywheel with a diameter of 2.32 m is rotating at an angular
speed of 103 rev/min. (a) What is the angular speed of the flywheel
in radians per second? (b) What is the linear speed of a point on
the rim of the flywheel? (c) What constant angular acceleration (in
revolutions per minute-squared) will increase the wheel's angular
speed to 1120 rev/min in 67.8 s? (d) How many revolutions does the
wheel make during that 67.8 s?

A wheel rotates with a constant angular acceleration of 3.90
rad/s2. Assume the angular speed of the wheel is 2.05
rad/s at ti = 0.
(a) Through what angle does the wheel rotate between t
= 0 and t = 2.00 s? Give your answer in radians and
revolutions.
rad?
rev?
(b) What is the angular speed of the wheel at t = 2.00
s?
rad/s?
(c) What angular displacement (in revolutions) results while the
angular speed found in part...

A wheel rotates with a constant angular acceleration of 3.90
rad/s2. Assume the angular speed of the wheel is 1.55
rad/s at ti = 0.
(a) Through what angle does the wheel rotate between t
= 0 and t = 2.00 s? Give your answer in radians and
revolutions.
___________rad
___________ rev
(b) What is the angular speed of the wheel at t = 2.00
s?
__________rad/s
(c) What angular displacement (in revolutions) results while the
angular speed found in...

A wind turbine is initially spinning at a constant angular
speed. As the wind's strength gradually increases, the turbine
experiences a constant angular acceleration 0.159
rad/s2. After making 2870 revolutions, its angular speed
is 132 rad/s. (a) What is the initial angular
velocity of the turbine? (b) How much time elapses
while the turbine is speeding up?
2. A dentist causes the bit of a high-speed drill to accelerate
from an angular speed of 1.11 x 104 rad/s to an...

A compact disc rotates from rest up to an angular speed of 31.6
rad/s in a time of 0.913 s.
(a) What is the angular acceleration of the disc, assuming the
angular acceleration is uniform?
______________ rad/s2
(b) Through what angle does the disc turn while coming up to
speed?
rad
(c) If the radius of the disc is 4.45 cm, find the tangential
speed of a microbe riding on the rim of the disc.
____________ m/s
(d) What is...

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