Question

A cooling fan is turned off when it is running at 850 rpm. It turns 1350...

A cooling fan is turned off when it is running at 850 rpm. It turns 1350 revolutions before it comes to a stop. (a) What was the fan’s angular acceleration, assumed constant. (b) How long did it take the fan to come to a complete stop?

Homework Answers

Answer #1

Answer Given that 4.850 rpm =1350_revolutions (a) we know that Angular acceleration 2 .. WE Wort 200 O . &= to wor 20 60 (b) a = -(850x211 2x1500x20 +2=-0.42 raden we know that 0=wo tw)t t= 20 wotw +- 2x1500x27 850x t=211.76 Sec T feelScanned-with- CamScanner

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A cooling fan is turned off when it is running at 920 rev/min. It turns 1100...
A cooling fan is turned off when it is running at 920 rev/min. It turns 1100 revolutions before it comes to a stop. Part A What was the fan's angular acceleration, assumed constant? Express your answer using three significant figures. Part B How long did it take the fan to come to a complete stop? Express your answer to three significant figures and include the appropriate units.
The blade in a food processor spins at 1700 rpm. After the machine is turned off,...
The blade in a food processor spins at 1700 rpm. After the machine is turned off, the blade comes to a stop in 3.7s. How many revolutions does it make during this time, assuming constant angular deceleration?
An electric fan is turned off, and its angular velocity decreases uniformly from 540 rev/min to...
An electric fan is turned off, and its angular velocity decreases uniformly from 540 rev/min to 220 rev/min in a time interval of length 3.85 s . (a) Find the angular acceleration in revolutions per second per second. (b) Find the number of revolutions made by the fan blades during the time that they are slowing down in part A. (c) How many more seconds are required for the fan to come to rest if the angular acceleration remains constant...
An electric fan is turned off, and its angular velocity decreases uniformly from 570 rev/min to...
An electric fan is turned off, and its angular velocity decreases uniformly from 570 rev/min to 250 rev/min in 3.00 s . Find the angular acceleration in rev/s2. Find the number of revolutions made by the motor in the 3.00 s interval. 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?
When starting a fan, it communicates a constant angular acceleration of 2.00 rad / s2. (a)...
When starting a fan, it communicates a constant angular acceleration of 2.00 rad / s2. (a) Calculate the time necessary for it to acquire a speed of 900 r.p.m. (b) How many laps does it make in that time? (c) If after turning it off, it makes 75 turns before coming to a complete stop, how long does it take to stop?
An electric fan is turned off, and its angular velocity decreases uniformly from 550 rev/min to...
An electric fan is turned off, and its angular velocity decreases uniformly from 550 rev/min to 150 rev/min in a time interval of length 3.85 A)Find the angular acceleration in rev/s2. B)Find the number of revolutions made by the motor in the time interval of length 3.85 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?
When a fan is turned off, its angular speed decreases from 27 rad/s to 4.0 rad/s...
When a fan is turned off, its angular speed decreases from 27 rad/s to 4.0 rad/s in 1.7 revolutions. Assuming it is constant, what is the angular acceleration of the fan? -210 rad/s2 -1.1 rad/s2 -9.8 rad/s2 -33 rad/s2
An electric fan is turned off, and its angular velocity decreases uniformly from 550 rev/min to...
An electric fan is turned off, and its angular velocity decreases uniformly from 550 rev/min to 180 rev/min in a time interval of length 3.70 s. 1- Find the angular acceleration in rev/s2. 2- Find the number of revolutions made by the motor in the time interval of length 3.70 s. 3- 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?
QUESTION 3 An electric fan is turned off, and it slows down from 356 revolutions/s to...
QUESTION 3 An electric fan is turned off, and it slows down from 356 revolutions/s to 80.1 revolutions/s in 4.07 seconds. How many times did the fan blades spin in this time? QUESTION 4 A disk rotates about a fixed axis through its center of mass and perpendicular to the disk. It starts from rest and accelerates uniformly, reaching angular speed ω after 8.44 revolutions. If it continues to accelerated at the same rate, how many more revolutions would it...
while staring at your ceiling fan, you decide to study the rotation. You discover that the...
while staring at your ceiling fan, you decide to study the rotation. You discover that the fan makes a complete revolution every 0.770s. When you turn the fan off, you find that it takes 65.0 s for it to come to rest. You then measure the blades and find the fan has a 1.10 m diameter. A) Find the initail angular speed of the fan B) Find the angular acceleration of the fan C) Calculate the inear speed of the...