Angular Acceleration Problem: Solving for 0.5 rad/s^2 in Fixed Axis Rotation

  • Thread starter Thread starter physicnow
  • Start date Start date
  • Tags Tags
    Axis Rotating
physicnow
Messages
10
Reaction score
0
I got this problem and I got the answer 0.5 rad/s^2, but it is not the right one. pls help me. thanks

At t=0 wheel rotating about a fixed axis at a constant angular acceleration has an angular velocity of 2 rad/s. Two seconds later it has turned 5 complete revolutions. What is the angular acceleration of this wheel.
 
Physics news on Phys.org
What's an equation relating angular displacement with time under uniform angular acceleration? And if you want to know why your answer is wrong you'll have to post what you actually did.
 
Thanks

I figured it out already.
 
Thread 'Need help understanding this figure on energy levels'

Thread 'Need help understanding this figure on energy levels'

This figure is from "Introduction to Quantum Mechanics" by Griffiths (3rd edition). It is available to download. It is from page 142. I am hoping the usual people on this site will give me a hand understanding what is going on in the figure. After the equation (4.50) it says "It is customary to introduce the principal quantum number, ##n##, which simply orders the allowed energies, starting with 1 for the ground state. (see the figure)" I still don't understand the figure :( Here is...
View full post »
Thread 'Understanding how to "tack on" the time wiggle factor'

Thread 'Understanding how to "tack on" the time wiggle factor'

The last problem I posted on QM made it into advanced homework help, that is why I am putting it here. I am sorry for any hassle imposed on the moderators by myself. Part (a) is quite easy. We get $$\sigma_1 = 2\lambda, \mathbf{v}_1 = \begin{pmatrix} 0 \\ 0 \\ 1 \end{pmatrix} \sigma_2 = \lambda, \mathbf{v}_2 = \begin{pmatrix} 1/\sqrt{2} \\ 1/\sqrt{2} \\ 0 \end{pmatrix} \sigma_3 = -\lambda, \mathbf{v}_3 = \begin{pmatrix} 1/\sqrt{2} \\ -1/\sqrt{2} \\ 0 \end{pmatrix} $$ There are two ways...
View full post »

Similar threads

Angular velocity of a wheel rolling around a fixed axis
Replies
1
Views
2K
Solve Angular Velocity & Acceleration - Dimensional Analysis
Replies
3
Views
2K
What is the Linear Distance and Angular Velocity of a Rotating Potter's Wheel?
Replies
7
Views
2K
Centripetal Acceleration while Swinging a Stone on a String
Replies
9
Views
1K
System of two wheels of different sizes with an axle through their centers
2
Replies
67
Views
4K
[Orbital mechanics] Asteroid angular momentum
Replies
2
Views
2K
I Rotating plate thrown parallel to ground
Replies
2
Views
1K
Two masses connected by spring rotate around one axis
Replies
2
Views
2K
Lagrangian Mechanics: Solving Homework Problem on Two Cylinders
Replies
3
Views
2K
Relating Linear and Angular Kinematics
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top