Monday, January 14, 2013
Rotational Inertia
This is a how to video explaining how to do a proper ice skating spin. In the video the man explains that when spinning it is important to cross your arms and bring them close to you chest. This move is explained by rotational inertia. Rotational inertia is the property of an object to resist change in the spin. Rotational inertia is controlled by both mass and the distribution of mass or how far the mass is from the axis of rotation. If the mass is closer to the axis than it is easier to rotate because it has mall rotational inertia. Mass further away from the axis makes it much more difficult to spin because there is large rotational inertia. Therefore the reason an ice skater crosses his/her arms close to their body is because the closer the mass is to the axis makes it easier to rotate.
http://www.youtube.com/watch?v=SK6KEnxbuJw
Subscribe to:
Post Comments (Atom)
I like how your video is about ice skating, which is probably something we'll have on our test. Both of ours deal with torque and hows its used in sports, but yours was more exemplary. I wouldn't change a thing!
ReplyDelete