Movement and Jiu Jitsu…

PRINCIPLES RELATED TO THE LAW OF ACCLERATION

Acceleration is proportional to the force causing it

A sprinter can increase acceleration by increasing the force that he/she applies backward and downward against the surface on which he/she is running” and, if he/she should double the force, then acceleration would double and, similarly, if he/she should keep the force constant and reduce mass, he/she would increase acceleration.

Maximum acceleration and efficiency of motion
To achieve maximum acceleration, all available forces should be applied sequentially with proper timing and as directly as possible in the intended line of motion.

Effects of body’s radius on angular velocity
The rate of rotation is increased as the radius of rotation is decreased (e.g., tuck head and bend knees; a shorter person will have a higher rate of rotation).

Conservation of momentum in swinging movement
To build or to conserve momentum in any swinging movement, the radius of rotation should be shortened on the upswing and lengthened on the downswing.

Movement while unsupported

When the body is unsupported, movement may occur to aid in controlling balance,

but the flight path (trajectory angle) will be unaffected by the movement.

Twisting movement
Are based on the transfer of momentum from part to whole, when in contact with a surface (have to initiate the twist in some way at take off).

Physics occurs in jiu jitsu, particularly in the movement.