You may wonder about Newton's Laws of motion
It's very simple
Newtons Law of Inertia just states
That an object in rest stays to stay at rest, while an object in motion tends to stay in motion
As you can see in the last scene with the ball that didn't move and the one that didn't stop.
same with when you open a swinging door. or kick a ball, even when you slam your locker shut. (you all know you do)
Newton's law of force and acceleration
states that when a force acts on an object, it will cause the object to accelerate. The larger the mass of the object, the greater the force will need to be to cause it to accelerate.
So if you have an object that is going at a constant speed. It will not change its speed until a force acts on it. Like with a sled, it goes the same speed if you push it across your lawn until you apply a force to slow it down or speed it up or go up or down a hill.
and we all know thats the best part
Law of action and reaction states
For every action there is an equal and opposite reaction
Like when you blow up a balloon and it goes all over the place, or when you see a fire hose that is going crazy or even a bird flying.
I hope this helps you see that we are always surrounded by examples of all of these laws
(even while you are sitting there you are following the law of inertia)