Welcome to AikiWeb Aikido Information
AikiWeb: The Source for Aikido Information
AikiWeb's principal purpose is to serve the Internet community as a repository and dissemination point for aikido information.

Sections
home
aikido articles
columns

Discussions
forums
aikiblogs

Databases
dojo search
seminars
image gallery
supplies
links directory

Reviews
book reviews
video reviews
dvd reviews
equip. reviews

News
submit
archive

Miscellaneous
newsletter
rss feeds
polls
about

Follow us on



Home > AikiWeb Aikido
Go Back   AikiWeb Aikido Forums > AikiWeb AikiBlogs > But Why?

Hello and thank you for visiting AikiWeb, the world's most active online Aikido community! This site is home to over 22,000 aikido practitioners from around the world and covers a wide range of aikido topics including techniques, philosophy, history, humor, beginner issues, the marketplace, and more.

If you wish to join in the discussions or use the other advanced features available, you will need to register first. Registration is absolutely free and takes only a few minutes to complete so sign up today!

But Why? Blog Tools Rate This Blog
Creation Date: 09-18-2006 01:15 PM
Erick Mead
Offline
rss2
Blog Info
Status: Public
Entries: 11
Comments: 6
Views: 119,694

Entries for the Month of May 2008

In General Rattling Bones Entry Tools Rate This Entry
  #7 New 05-23-2008 09:32 AM
Ki is rattling a bag of chicken bones in the eyes of some. I have a view of Ki, as a physical cyclic phenomenon that has a demonstrable physical basis -- and it really does rattle a bag of bones, but no chicken is involved -- unless you're just into that kind of thing -- not that there's anything wrong with that.

In response to a question about impulse of a strike it struck me (pun intended) that it is a matter not just of length of time, but of timing (in the sense of rhythm) in the frequency of the strike at impact. It matters -- not merely speed, but the actual frequency of the impact/react timing.

It requires some teensy background on force, momentum and Newton's Third Law (action= reaction).

The commonly understood linear equation F = ma can be rewritten as Σ F= dp/dt where the sum of forces is the change of momentum (p) with respect to time (t). Impulse, J = F * dt = dt* F = dt*dp/dt = dp, which is simply the change in momentum.

Very, very rarely can real world forces be treated as purely linear. Most forces are usually:
1) not isolated (there are other forces in play, with different 3D vectors),
2) dynamic, and the amount of force is changing rapidly with respect to time, and
3) eccentric (off center) as to both or all objects involved, thus involving moments (potential rotations) or actual rotations (angular momentum).

When an object is struck what strikes back (3rd law) is its moment of inertia -- its inherent reaction to havi ...More Read More
Views: 11272




All times are GMT -6. The time now is 08:46 PM.



vBulletin Copyright © 2000-2014 Jelsoft Enterprises Limited
----------
Copyright 1997-2014 AikiWeb and its Authors, All Rights Reserved.
----------
For questions and comments about this website:
Send E-mail
plainlaid-picaresque outchasing-protistan explicantia-altarage seaford-stellionate