Here is another more general case: You can drag the Force arrow to change it's direction.
1. Choose the center of the disk as origin.
Assume the friction force is f, The x, y component of the external force F is Fx, Fy
Then from Newton's law:
The Net torque is
Assume the disk motion satisfy "Rolling Without Slipping" condition: i.e.
We will get
is the new "Moment of inertia" if we move the origin to the point disk in contact with the surface.
Click the following image to show the simulation.
Full screen applet
Embed a running copy of this simulation
Embed a running copy link(show simulation in a popuped window)
or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site listPress the Alt key and the left mouse button to drag the applet off the browser and onto the desktop.
This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
- Please feel free to post your ideas about how to use the simulation for better teaching and learning.
- Post questions to be asked to help students to think, to explore.
- Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!