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 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
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
4K
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
3K
How Is Angular Speed Calculated for a Chain Saw Sprocket?
Replies
1
Views
6K

Hot Threads

Recent Insights

Back
Top