Newton's Law

Newton 's law is a law that describes the relationship between forces acting on an object and its motion. This law of motion is the foundation of classical mechanics described in three Laws of Physics .
As the name implies, Newton's Law was founded by a physicist, mathematician , and philosopher from England called Sir Isaac Newton (1643 - 1722). He discovered the laws of gravity, the laws of motion , calculus, reflective telescopes, and spectra.

In order for you to understand Newton's Law of Motion material well, you must understand first:

•  Motion Straight

Newton's Law 1

Sound: "If the resultant on an object is equal to zero, then the stationary object will remain stationary and the moving object will remain at a steady pace".
Under this law, you can understand that an object tends to maintain its state. A stationary object will tend to remain stationary and moving objects will tend to keep moving. Therefore, Newton's Law I is also referred to as the law of inertia or the law of inertia.
An example of the application of Newton I Law can you observe when you are in a moving vehicle then suddenly braking, then your body will be pushed forward. That is what is meant by "the tendency to keep going." Another example you can observe when you are sitting on a silent vehicle then moves abruptly, then your body will jerk backwards. That is what is meant by "the tendency to remain silent".
The above examples are event of inertia or inertia. The inertia of an object is determined by the mass of the object. The greater the mass of the object, the greater the inertia.
Mass is the inertia of an object. The larger the mass of an object, the larger the force required to make the object accelerate or accelerate. In addition, the mass of large objects will be more difficult to move from a stationary position and hard to stop from moving conditions.

Newton's Law 2

Beep: "The acceleration of an object is directly proportional to the total force acting on it and inversely proportional to its mass. The direction of acceleration is equal to the direction of the total force acting on it ".
Under Newton II Law, you can understand that an object will increase its speed if given a total force whose direction is the same as the direction of motion of the object. However, if the direction of the total force applied to the object is opposite to the direction of motion of the object, it will decrease the rate of the object or even stop it.
Because speed change or speed is acceleration. Then it can be concluded that the total force applied to the object can cause acceleration. An example of the application of Newton II law can you observe when you kick a ball (meaning you give a force to the ball), then the ball will move with a certain acceleration.
Newton II's law is denoted by the formula:
$$\text{\sigma F}=\text{m . a}$$
Where :
$$\\sigma F=\text{the total force acting on the object (N)}$$
m = mass of body (kg)
a = acceleration of objects (m / s 2 )

Newton's Law 3

Beep: "When an object gives force to a second object, it gives the same force as opposite to the first."
The example of the application is when you hit the table (meaning giving a style to the table), then the table will give the force back to your hand with the same magnitude and the opposite direction with the direction of style you give. Therefore, the bigger you hit the table, the more pain your hands will become because the table is doing a style that is also getting bigger in your hands. Look at the picture below.

Newton's Law III is denoted by the formula:
$$\text{F_{1} = - F_{2}}$$
$$\text{F_{aksi} = - F_{reaksi}}$$

Where:
  $$\text{F_1 = force given to object 2 (N)$$
  $$\text{F_{2}}$$= force received back to object 1 (N)


Example :

Train M accelerated to the right with acceleration a0 = 2 m/s2 . Ignore all the friction, the mass of the pulley, and also the mass of the rope. Suppose g = 10 m / s 2 . If m1 = m2 = m3 = 2 kg.  then the strap voltage T on the system ....


 

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