Newtons First Law of Motion
All bodies will continue in the same state of motion and direction as long as there are no unbalanced forces acting against it. This law is demonstrated in this video clip because you can see the ball going in the same direction, imagining the floor was frictionless, it would be going at the same velocity. It would maintain speed and direction but there are unbalanced forces acting against the ball, as the force of friction is greater than the force applied and the ball comes to a stop. If the floor was frictionless the ball would continue to move proving this first law of motion. Interesting fact; there are no known absolutly frictionless natural surfaces.
Newtons Second Law of Motion
A body will accelerate if unbalanced forces are acting agaisnt it. The rock accelerated because the force applied was greater than the force of friction (unbalanced forces). This law also states that force depends on the product of mass and acceleration. (This is formula; F=ma) So in order to accelerate a mass there needs to be a force, if the mass increases the force required to move that mass increses as well. Same if a force decrease it will decrease the acceleration of the object. If there were no acceleration (if there was constant velocity) this would mean that there was no force. In this case, the video demonstrated how when a greater force is applied the rocks acceleration increased and when the force was less the rocks acceleration decreased. This proves Newtons second law of motion to be true.
Newtons Third Law of Motion
Every force excerted by an object to a second object, there is an equal but opposite force excerted on the first object. This law applies many times in our daily world, while walking, biking, running, playing a sport et cetera. This video is of someone running. This video demonstrates the third law of motion because when your foot pushes backwards on the ground and you move forward. This is because the ground excerts an equal but opposite force on you which is a force that propelles or pushes you forward. So basically, both objects expierience the same maginitude of the excerted force though the direction of the force on each object is opposite.