1. KINETIC ENERGY
Do you know what it is potential energy and kinetic energy?????
before we discuss what is the definition of potential and kinetic energy, we must first know what it is energy.
Energy is a measure of an ability things to do work.
Now that energy there so many kinds, including the potential energy and kinetic energy. To better understand what it is and what it's kinetic energy potential energy we can see it in everyday life - the day
When we moving down the road or moving up at high road , we requires the energy.
Do you want to know what energy have done????
There are 2 energy work on this situation. That kinetic energy and potential energy ... how the relationship between the 2 above it in case???? To better understand it we must know the definition of potential energy and kinetic energy
Potensial energy is the owned energy because of the influence of potition and the place of the things.
Kinetic energy is the energy of an object that is owned by the influence of the movement.
The potential energy contained in a stationary object, it can turn potential energy into kinetic energy when, the object is moving.
When we’re moving up the road the energy thet we need is kinetic energy + potensial energy . when we’re moving down the road the energi that we need is kinetic energi + potensial energy, but the direction of gravity direction of our movement (down) so that a negative potential energy mathematically.
From the equation we know that :
Kinetic energy + potensial energy > kinetic energy – potensial energy.
So when climbing the required energy > current energy down
2. procedures experiment of pendulum
No one knows not why we did not bounce out of the earth when the day changed night and vice versa????
when we know that the earth rotates and evolve ...
The answer is because the Earth has gravity ....
Well no one knows not how do we define and understand the earth's acceleration garvitasi?????
It was short and simple experiment to determine the value of gravity ....
We can use mathematical pendulum or swing. The motion of the pendulum's swing meet the concept of simple harmonic motion is the motion back - behind the object through a certain equilibrium point to the number of vibrations per second object in constant
So while for the experiment to determine the acceleration of gravity following steps – steps
Determine the length of rope that we used
Pull rope with an angel rangging 100
Remove the rope and let the pendulum swing 10 times and note the long swing
When the swing 10 times determined by dividing the value of the period by the number of swing 10 times before
Use the equation to determine the period of pendulum swing value of the acceleration of the gravity
Using the following aquation :
3. electrical calculation
At the material time, we will be the same - just discussing a law that is applied to the electrical world ohms law. ever heard of this law?????
Ohm's law states that the electric current flowing conductor at a beranding always straight with the application of a potential difference
Mathematically can write like this
V = I R
From the equation above, we can analyze if the potential is enlarged then the current flow will be greater, but if we add the constraints that the current that flows will be smaller.
Consider the following issues
In an electrical circuit in use batrai has 1.5 voltage and resistance in use-value of 100 ohms, what is the value of the current flowing in the circuit????
The solution is of so'al above we know the value of v = 1.5 V, and the value of r = 100 ohms.
The formula for determining the electric current is I = V / R
So I = 1.5 V / 100 ohm
The result is 0.015
So in a series that uses viltase 1.5 and has a resistance of 100 ohms will be flowing current of 0.015 A.
4. Sound as a wave
Before i give we know the evidence sound as wave, i’ll give you the definiton of wave. Wave is energy propagation without the movement of the partikel.
The sound is a kind of wave, why??? Because sound coming from the propogation things, and sound always need a medium to get propogate and the direction of sound go all arround and linier. The sound also have the same character with the wave. What’s the character????
1. Reflection
2. Refiaction
3. Interference
4. Difraction
And the examplifying of this case is
Sound from the guitar....
Have you play the guitar???
When you play the guitar firstly you pick the string... and than you hear the sound...
When you pick the string it’s mean you a’re trembeled the string and than the partikel of sound fly arround with the air and linier arround the source of the sound... it’s konsep is same with the wave concept. It’s why the sound is a wave and sound can called longitudinal wave.
