Dancing Physics

In our past Physics class with Mr. José Popoff, we had the opportunity to dance with a dancepad a classmate took to school. You might be asking yourself "what does dancing has to do with Physics?" Lets see.
The topic we are studying in Physics is Newton's Laws of Motion. First of all, lets state Newton's Laws.

1. First law: If there is no net force on an object, then its velocity is constant. The object is either at rest (if its velocity is equal to zero), or it moves with constant speed in a single direction.

2. Second law: The acceleration a of a body is parallel and directly proportional to the net force F acting on the body, is in the direction of the net force, and is inversely proportional to the mass m of the body, i.e., F = ma.

3. Third law: When a first body exerts a force F₁ on a second body, the second body simultaneously exerts a force F₂ = −F₁ on the first body. 

Now that we have stated this laws, lets apply them when dancing.

First Law.

Explanation: The first law says that if there's not a changing force applied to an object, for example if you don't push/pull harder or softer, then the object's velocity is going to be constant. If the velocity is constant, the object can be at rest (if its velocity is equal to zero) or it can be moving with a constant speed and in a single direction. Constant means that it doesn't change at all.
Application: Lets take your body as the object. If you are not moving at all (velocity equals zero), then your velocity is constant because it is always zero. Now, lets say you start moving from left to right and you don't stop nor change your velocity, no one gets in your way, so you continue to move and move. Since you are not accelerating, there's no net force being applied on you, therefore there's no change in your velocity making your velocity be constant.

Second Law.

Explanation: The second law of motion says that the acceleration of an object is dependent upon two variables, the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting on the object, and inversely on the mass of the object. As the net force is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

Application: Again, lets take your body of an object. When you dance, sometimes you jump, so lets say you are jumping. When you jump, you excert a force against the floor which pushes you up, this is the net force. Depending on how strong the net force is you will jump high or not that high. Then, how high or how much you accelerate, is dependent on how strong the net force is. Now the mass. Lets say you have this friend who is chubby. He has a lot of mass! What do you think is easier? Is it easier for a thin kid to jump or for a chubby one? For the thin, of course! Why? Because the mass of the thin kid is less than mass of the chubby one, therefore it's easier for him to lift his body from the floor. So we can say that an object's acceleration depends on its mass.

Third Law.

Explanation:  The third and last of Newton's laws says that when, for example, lets say you gave an initial force (F1) to an object, that force caused the object to move, so the object is moving, and moving, and moving, when suddenly, it hits another object. When the first object hit the second object, it produced a force on the second object (F2) which is in the opposite direction to F1 but with the same magnitude. (-F1). This means that F₁ and F₂ are equal in magnitude and opposite in direction.

Application: Lets say we are not expert dancers. We are human and we make mistakes. So while we are dancing, we are moving from side to side, and suddenly we crash against a mate who is not moving (he is at rest, velocity equals zero). When we crash against him, we excert a force on him, causing him to move and eventually fall to the floor. The force we excerted on him has exactly the same magnitude or strength as the force that was moving us but in the opposite direction.

So, now you know how you can apply physics when dancing. Hope you liked my post, I would appreciate any comment. Thank you very much for reading.