jigoro-kano-kodokan-judo_compress

THE PRINCIPLE OF DYNAMICS
The diagrams below show what is important in terms of dynamics and
the body's center of gravity. Best results are ensured by making use of the
opponent's strength. On your part, composure, rather than mere strength,
is important to keep muscles and joints from stiffening. Especially in emergencies,
body strength should be conserved, then applied at the correct
moment.
17. A heavy door can be moved with ease
because we apply pressure at a right angle to its
surface at a point well removed from the door's
fulcrum (fl, which is the hinged side.
1 6. A person is balanced as long as the vertical gravitational
line passes through the middle of the base
formed by his legs and hips. When it does not, he is
offbalance and can be brought down with moderate
effort.
THE PRINCIPLE OF DYNAMICS 41