Wing Tzun - Natural Laws of Motion Vocabulary (Physics)

Balance:When the center of gravity falls above the foundation, an object is in a stable state and will not trip over easily.

Basic Movement Theory:
Whenever moving, you should step with the foot closest to the direction of travel first. This will keep you from crossing your feet and becoming unstable. Stepping with the foot closer to the direction of travel first will also allow for smoother and quicker movements.


Center of gravity (same ass center of mass) :
The point on an object where all its weight seems to be focused. ON an object of uniform shape and weight, the center of gravity is in the middle. On an object of non-uniform shape and weight, the center of gravity is toward the heavier end. To remain stable, the center of gravity should be as low as possible, above the foundation.

Gravity: An attraction between objects due to mass.

Hard Martial Art systems or style: These systems rely on wide stances and linear moves, with full focus of power into a single strike.

Inertia:
Resistance to change in motion. An object at rest tends to stay at rest; an object in motion tends to stay in motion.

Mass:The quantity of matter in an object. When acted upon by gravity, we can use mass interchangeably with weight.

Momentum: The product of the mass of an object and its velocity. The heavier the object,
and the faster it travels, the grater the momentum.

Pounds Per Square Inch:
The narrower the base of an object, the more pounds per square inch. A narrow base will be less stable than a wide base, but it will also have more penetrating capability.

Sensory Overload:
By striking and kicking with explosive combinations to as many targets as possible in the shortest amount of time, you will create ?~@~\ sensory overload?~@~]
and send your opponent into a state of confusion and chaos.

Soft Styles: These style rely on more flexible stances and circular moves, with the power building through one or more ?~@~\set-up?~@~] strike.

The change in momentum. The faster you can change the momentum, the greater the impulse, and the grater the power.

Kinetic Energy:
Half the mass times the speed squared. Kinetic energy depends on mass and the speed of the object. If a fighter can double his speed, he can quadruple his kinetic energy. Kinetic energy has a grate capability of doing damage.

Resultant:
of all vectors. When throwing a strike, we should strive towards making the resultant as long as possible.

Rotational Inertia:
Resistance to change in an object that is rotating. It takes a force to change the state or direction.

Vector: An arrow symbolizing the strength and direction of a force. The longer the arrow, the stronger the force. For maximum power, all vectors must point in the direction of your strike.

Velocity: A measure of the speed of an object and its direction.

Acceleration:
Change in speed and / or direction. An object that is in motion and changes its direction (a car driving up the clover leaf on-ramp to the highway), will accelerate even if there is no change in speed. You can feel that acceleration is taking place by the way your body lurches forward, back or sideways.

F=ma: Force equals the mass times the acceleration. A lot of weight and a lot of speed will produce a lot of power. A lightweight fighter can make up for the lack of sufficient mass by being faster than a heavyweight.

Force: Any influence that can cause an object to be accelerated.

Projectile: An object following a curved path from over the top (over head strike). In the path of a projectile, only the vertical vector component will increase or in size, while the horizontal vector component remains constant. Because of gravity, the resultant will be at its longest in the downward motion of the projectile.

Adding Momentum:
When two object move toward each other and collide, the force of impact will de stronger than if only one object is moving, providing that the speed is the same in both cases.

Conservation Of Angular Momentum:
Whenever a rotating body contracts, its rotational speed increases. A rotating body will cover the same area within a specified time frame. A rotating body which is ?~@~\spread out?~@~] will caver a large area than one which is contracted. Therefore, the contracted body will need to spin faster in order to cover the same area.

Friction:
Resistance of motion between two solid surfaces, liquids, or gases. Friction is less in air than in water or on ground.

Linear Speed:
The tip of a rotating system will move faster than the center, even through the rotational speed (revolutions per minute) are the same throughout the system.

Newton's First Law Of Motion:
An object in motion tends to stay in motion unless acted upon by some outside force. Martial Artist strive toward throwing a continuous combination, rather than many single strikes.

Newton's Second Law Of Motion:
The acceleration of an object is directly proportional to the net force acting on the object, is in direction of the net force, and is inversely proportional to the mass of the object. Whereas a big force produces a large acceleration, a big mass resists acceleration.

Newton's Third Law of Motion:
To every action there is an equal and opposite reaction. You cannot hit someone or something without being hit back with an
equal and opposite force.

Rotational Speed:
The number of rotations per unit of time (revolutions per minute). In a Spinning technique, the revolutions per minute in the center is the same as the revolution per minute near the tip. However, the tip will move with a faster linear speed because it is farther from the axis. The rotation speed is the same regardless of how far you are from the centre, but the linear speed is proportional to the distance from the axis.

Torque:
The product of the lever arm and the force. The longer the lever arm the less force is needed to produce a given amount of torque.

Energy:
That which enables you to do work. If you have a lot of energy, you can do a lot of work.

Potential Energy:
Energy that is stored and held in readiness. Ones released, it becomes Kinetic energy.

Power: In physics, power is equal to work divided by time interval. Cutting the time interval enables you to attain more power. The Martial Artist often thinks of power in terms of how much damage one is able to do when landing a strike.

Squared: A number times itself.

Work: Force times distance. For a given force, you can use a shorter distance to do less work. Work takes energy, so if you can do as little work as possible, you can attain a considerable amount of power.

Impulse: change in momentum, or the force time the interval. The shorter the time, greater the force. And vice versa.

Resonance:
A vibrating force or wave that causes a vibration in an object at its natural vibration frequency.