Question
In: Physics
A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 50...
A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 50 sec. It is then turned off and coasts to a stop in 40 s. Find the total number of revolution made before the fan stops
Solutions
Expert Solution
Let us divide the problem in two parts, one before it reaches 120 rev/min in 50 sec and second during next 40 Second after it.
1.
Initial Angular Speed
Final Angular Speed
Then angular acceleration will be
Angular distance covered in this duration
2.
Initial Angular Speed
Final Angular Speed
Angular Acceleration will be
Angular distance covered in this duration
Total angular distance covered
Number of revolutions
genius_generous answered 2 years agoRelated Solutions
An electric fan is turned off, and its angular velocity decreases uniformly from 460 rev/min to...
An electric fan is turned off, and its angular velocity
decreases uniformly from 460 rev/min to 210 rev/min in a time
interval of length 4.15 s . a)Find the angular acceleration in
rev/s2. b)Find the number of revolutions made by the motor in the
time interval of length 4.15 s . c)How many more seconds are
required for the fan to come to rest if the angular acceleration
remains constant at the value calculated in part A?
An airplane propeller...
. Ten seconds after an electric fan is turned on, the fan rotates at 300 rev/min....
. Ten seconds after an electric fan is turned on, the fan
rotates at 300 rev/min. Its average angular acceleration is: a.
3.14 rad/s2 b. 30 rad/s2 c. 30 rev/s2 d. 50 rev/min2
A cooling fan is turned off when it is running at 840 rev/min . It turns...
A cooling fan is turned off when it is running at 840 rev/min .
It turns 1400 revolutions before it comes to a stop. Part A:What
was the fan's angular acceleration, assumed constant? Part B: How
long did it take the fan to come to a complete stop? Please show
step by step
A cooling fan is turned off when it is running at 840 rev/min . It turns...
A cooling fan is turned off when it is running at 840 rev/min .
It turns 500 revolutions before it comes to a stop.
1.) What was the fan's angular acceleration, assumed
constant?
2.) How long did it take the fan to come to a complete stop?
An electric motor is turned off, and its angular velocity decreases uniformly from 900 rev/min to...
An electric motor is turned off, and its angular velocity
decreases uniformly from 900 rev/min to 400 rev/min in 6.00 s. (a)
Find the angular acceleration and the number of revolutions made by
the motor in the 6.00-s interval. (b) How many more seconds are
required for the motor to come to rest if the angular acceleration
remains constant at the value calculated in part (a)?
A wheel is rotating freely at angular speed 530 rev/min on a shaft whose rotational inertia...
A wheel is rotating freely at angular speed 530 rev/min on a
shaft whose rotational inertia is negligible. A second wheel,
initially at rest and with 5 times the rotational inertia of the
first, is suddenly coupled to the same shaft. (a) What is the
angular speed of the resultant combination of the shaft and two
wheels? (b) What fraction of the original rotational kinetic energy
is lost?
The spin cycles of a washing machine have two angular speeds, 416 rev/min and 632 rev/min...
The spin cycles of a washing machine have two angular speeds,
416 rev/min and 632 rev/min . The internal diameter of the drum is
0.560 m
Part A
What is the ratio of the maximum radial force on the laundry for
the higher angular speed to that for the lower speed? (F higher/F
lower)=?
Part B
What is the ratio of the maximum tangential speed of the laundry
for the higher angular speed to that for the lower speed? (V...
A cooling fan is turned off when it is running at 900rev/min . It turns 1100...
A cooling fan is turned off when it is running at 900rev/min .
It turns 1100 revolutions before it comes to a stop.
Part B How long did it take the fan to come to a complete
stop?
The angular velocity of flywheel decreases uniformly from 12000rev/min to 3000 rev/min in 8 sec. Find...
The angular velocity of flywheel decreases uniformly from
12000rev/min to 3000 rev/min in 8 sec. Find theangular acceleration
and the number of revolutions made by the wheel in the 8 sec
interval. How many more seconds are required for the wheel to come
to rest?
An electric ceiling fan is rotating about a fixed axis with an initial angular velocity magnitude...
An electric ceiling fan is rotating about a fixed axis with an
initial angular velocity magnitude of 0.300 rev/s . The magnitude
of the angular acceleration is 0.920 rev/s2 . Both the the angular
velocity and angular acceleration are directed counterclockwise.
The electric ceiling fan blades form a circle of diameter 0.740 m
.
Part A:
Compute the fan's angular velocity magnitude after time 0.191 ss
has passed.
Express your answer numerically in revolutions per second
(rev/s)
Part B:
Through...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Two cannons are mounted as shown in the drawing and rigged to fire simultaneously. They are...
- What is the potential of a cell made up of Zn|Zn2+ and Cu|Cu2+ half-cells at 25o...
- Write a Java Program using the following instruction: Create the following 3 methods that calculate and...
- How would the S/D curves shift if a $3 tax was imposed on suppliers for each...
- Why should a time-based authentication system invalidate the current password on a successful authentication?
- Explain the difference between a market penetration strategy and a market development strategy.
- QUESTION 4 Discuss the sanctity of life versus the quality of life debate as presented by...
ADVERTISEMENT