Newton's 3 Laws of Motion

 1. A body at rest or motion will remain in that state unless acted upon by and external force

2. Force equals mass times acceleration

3. Every action has an equal and opposite reaction

1. a
Imagine a car that needs a push to get it started.
Stand in front stance and push.
Use your force to overcome the inertia.
Change it's state from at rest to in motion.

1. b
Imagine a car rolling towards you.
Stand in front stance and push.
Use your force to overcome the momentum.
Change it's state from in motion to at rest.

2.
Imagine a bullet.
If I throw it at you it may sting a bit.
If I use a catapult to fire it at you it will probably bruise you.
If I load it in a gun and fire it then it will go right through you

3.
This one is always misunderstood and misquoted.
When you hit something, however much force you land, the same gets sent the other way. Like the recoil on a gun.

1. a. punch an opponent in attack
SDA

1.b.punch an attacking opponent
Stophit - interception - jeet kune do

2.
step
bend the knee
hip
shoulder
THEN throw the punch

3. block the punch break the forearm
block the kick break the shin
eblow block crush the fist
ken kudaki - strike destroyer