which direction will it roll?
the spool is pulled horizontally to the right.
in which direction will it roll?
Want to know the answer ? Try the following java applet! Or find a spool
and check it out?
What if it is pulled in the following way?
to the left?
to the right?
Think about itĦIĦIĦI And explain why ?
You need to answer the question first in order to start the animation.
Pick an answer!
Press Reset for default parameters.
You can click near the top of the green region and drag it up and down.
Try it with different height!
Press Start to start the animation.
During the animation, click the left mouse button to suspend the animation.
Click it again to resume.
Your suggestions are highly appreciated! Please click firstname.lastname@example.org
AuthorĦGFu-Kwun Hwang, Dept. of physics, National Taiwan Normal University
Last modified :