Calculate Initial Angular Speed of Fan | High to Low Button Pushed

AI Thread Summary
The discussion focuses on calculating the initial angular speed of a fan that decelerates from a high speed to a low speed after the LOW button is pressed. The fan's final angular speed is 98 rad/sec, and it decelerates at a rate of 42.3 rad/sec² over 1.83 seconds. Using these values, the initial angular speed can be determined through the kinematic equations for rotational motion. The radius of the fan blades is 0.62 meters, which is relevant for understanding the fan's physical dimensions but not directly needed for the speed calculation. The conversation emphasizes the straightforward nature of the calculation involved.
choole
Messages
6
Reaction score
0
An electric fan is running on HIGH. After fan has been running of 13.2 minutes, the LOW button is pushed. The fan slows down to 98 rad/sec in 1.83 seconds. The blades of the fan have a radius of 0.62 meters and their deceleration rate is 42.3 rad/sec2.

What was the initial angular speed of the fan in rev/sec?
 
Physics news on Phys.org
--> Homework forum??
 
look at the second omega and alpha... its only one step to the solution...

edit: does seem to belong there eh pete?
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »

Similar threads

Angular Speed of Electric Fan: Calculations & Results
Replies
10
Views
5K
Magnitude of Acceleration on Merry-Go-Round
Replies
2
Views
2K
Ceiling Fan Blade Acceleration and Angle Calculation
Replies
9
Views
8K
How Does a Man's Movement Affect the Angular Speed of a Merry-Go-Round?
Replies
4
Views
5K
How Do You Calculate the Angular and Linear Speed of a Ball?
Replies
5
Views
3K
How Do You Calculate Angular Speed and Velocity of Clock Hands?
Replies
10
Views
6K
Conservation of Momentum; finding the angular speed of a Neutron star
Replies
4
Views
14K
Calculating Angular Speed with a Running Person on a Rotating Disk?
Replies
1
Views
2K
How Is Angular Speed Calculated After Clay Impacts a Wheel?
Replies
8
Views
4K
How Is Angular Speed Calculated for a Chain Saw Sprocket?
Replies
1
Views
6K

Hot Threads

Recent Insights

Back
Top