Physics pt. 9: Energy

 Kinetic energy is a type of energy that relies on mass and speed, to exist.

So let's say you roll on the ground a lightweight ball and a heavy ball, with the same force, the heavier one will roll faster since it has more mass. 

But if you roll the lighter ball with more force than the heavier one, the lighter one will move faster. 

The equation that we use is Ke = M* V^2
Ke means kinetic energy or kinetic energy is equal to Mass times Velocity squared.

Potential energy is energy that is stored in an object. And it has the potential to output that energy to say, Kinetic energy.

First is Gravitational Potential energy.
Let's take the earth for an example, lets put a yellow ball 50 feet in the sky, and another red ball 100 feet into the sky.
Which ball do you think will fall the fastest, well its the red ball because the red ball is further away and has more GPE or Gravitational Potential Energy 

The second is Elastic  Potential energy.
Let's use a rubber band as an example, if we pull on it, and when we let go, it will spring back to its normal position, but wait, why did it snap quickly and not slowly go back into shape, well Elastic Potential Energy. Another good example is a spring as when you compress a spring, it will try to "spring" back and cause the Elastic Potential energy, to happen.

Third is Electric Potential energy.
Which is an object that is electrically charged due to another charged object, which means that a positive charge and a negative charge is next to each other they attract. While two positive or two negative charges repel.

Forth and last one is Magnetic potential energy.
Magnetic potential energy is a type of energy that comes from the magnetic force of magnets, not only the position of the magnets matter (how near and how far they are). But also the orientation of the magnets affects the potential energy.

All these are potential energy. Potential energy, in summary, is an object's orientation, position, and the material it is made of. It is compared mainly using mass, size and shape.

Energy cannot just "disappear" as part of The Law of Conservation of Mass, "Matter is not created nor destroyed", so if one object loses its energy, another object but inherit that lost energy.

Energy can change forms, for example, if you were to use a blow dryer, it turns electrical energy into heat or thermal energy.
Or when a car speeds up too fast, the kinetic energy while driving is turned into thermal energy.
And when you hit the breaks on a bike, the breaks cause the wheels to stop and cause the tyres to produce heat because of kinetic energy and friction.