## Center of gravity

1. Definition of the center of gravity A rigid body is composed of many particles, therefore the gravitational force acting on each of these particles. In other words, each particle has its own weight. The center of gravity of...

## Types of equilibrium of the rigid body

Not all things we find in everyday life always rest. Maybe at first the object rest, but if it is moved (for example by the wind) objects can move. The problem is, whether after moving, objects return to their...

## Equilibrium of a rigid body

1. First condition Newton’s Second Law states that if the resultant force on an object (an object considered as a single particle) is not zero then the object will move with constant acceleration, where the direction of the object’s...

## Springs in series and parallel

1. Springs in series If the spring is connected in series, as in the figure on the side, then: 1. The increase in the length of spring = the increase in length 1 + the increase in length 2...

## Hooke’s law

1. Hooke’s law for springs If the spring is pulled to the right, the spring will stretch and increase in length (figure 1). If the pull force is not very large, it is found that the increase in spring...

## Ohm’s law

Definition of Ohm’s law In almost all metal conductors, the electric field is proportional to the density of the electric current, where the ratio of the electric field to the electrical current density is constant. Mathematically expressed through the...

## Resistivity

On the topic of electric current, the density of electric current has been discussed, so also the electric field has been explained in-topic about the electric field. The electric field and electric current are in a conductor if there...

## Resistor color code

The resistor is one component of an electrical circuit that functions to control the number of electrical currents. In general, there are two types of resistors, namely wire coil resistors and carbon resistors. Wire roll resistors are usually used...

## Resistors in series

If the resistors are connected as shown in the figure, the resistors are arranged in series. Resistor or electrical resistance in question can be in the form of resistor components, lights, or other electrical resistance. The electric charge moves...

## Electric resistance

Equation of resistance In the topic of Ohm’s law, a formula that states the relationship between the voltage (V), electric current (I), and electrical resistance (R) has been derived. Mathematically expressed through equations: This equation shows that the electrical...