This post will show you some important definitions in electronics and electrical. So, let’s get started.

**Mass**

The matter possessed by a body is called as mass. It is denoted by “m” and its unit is kilograms (kg).

**Velocity**

The velocity of a body is defined as the distance traveled by it in unit time. It is denoted by “v” and measured in meter/second.

**Acceleration**

Acceleration is defined as the rate of change of velocity. Its unit is meter/sec^{2}.

**Force**

Force is defined as the push and pull required to change the state of rest or state of uniform motion of a body. The unit of force is Newton. Mathematically force is equal to the product of mass and acceleration. It is denoted by **F.**

؞** F = m x a Newton**

Thus, 1-Newton force is defined as the force required accelerating a mass of 1 kg by 1m/s^{2}.

**Weight**

Weight is defined as the product of mass and gravitational acceleration. It is denoted by **W.**

؞** Weight W = m x g**

Where g = gravitational acceleration = 9.81 m/s^{2}.

**Torque**

Torque is equal to the product of force and the perpendicular distance between the lines of action of force and the axis of rotation.

؞** Torque T = F x r**

؞ F = Force and r = Radial distance

**Work**

When a Force F acts on a particle, the particle, then the particle moves through a distance d. in this situation the work is said to be done and it is defined as the product of force and displacement.

؞** Work done (W) = Force (F) x Displacement (d)**

The work done is measured in Newton-meter or Joules, and it is denoted by **W**.

**Power**

The power is defined as the rate of work done with respect to time.

؞** Power = Work done/Time **

The power is measured in joules/sec. or newton-meter/sec. or watt.

This post will show you some important definitions in electronics and electrical. So, let’s get started.

**Mass**

The matter possessed by a body is called as mass. It is denoted by “m” and its unit is kilograms (kg).

**Velocity**

The velocity of a body is defined as the distance traveled by it in unit time. It is denoted by “v” and measured in meter/second.

**Acceleration**

Acceleration is defined as the rate of change of velocity. Its unit is meter/sec^{2}.

**Force**

Force is defined as the push and pull required to change the state of rest or state of uniform motion of a body. The unit of force is Newton. Mathematically force is equal to the product of mass and acceleration. It is denoted by **F.**

؞** F = m x a Newton**

Thus, 1-Newton force is defined as the force required accelerating a mass of 1 kg by 1m/s^{2}.

**Weight**

Weight is defined as the product of mass and gravitational acceleration. It is denoted by **W.**

؞** Weight W = m x g**

Where g = gravitational acceleration = 9.81 m/s^{2}.

**Torque**

Torque is equal to the product of force and the perpendicular distance between the lines of action of force and the axis of rotation.

؞** Torque T = F x r**

؞ F = Force and r = Radial distance

**Work**

When a Force F acts on a particle, the particle, then the particle moves through a distance d. in this situation the work is said to be done and it is defined as the product of force and displacement.

؞** Work done (W) = Force (F) x Displacement (d)**

The work done is measured in Newton-meter or Joules, and it is denoted by **W**.

**Power**

The power is defined as the rate of work done with respect to time.

؞** Power = Work done/Time **

The power is measured in joules/sec. or newton-meter/sec. or watt.

**Energy**

The energy is defined as the capacity to do work. The energy is measured in joules. The energy is of two forms:

- Kinetic energy
- Potential energy

**Kinetic Energy**

Kinetic energy is defined as the energy possessed by the body due to its motion. If a body of mass “m” is moving at a velocity “v” possesses the kinetic energy given by,

**Kinetic energy = ½ mv ^{2} joules**

**Potential energy**

Potential energy is the energy possessed by a body due to its position. When a body of mass “m” is lifted vertically through a height of “h” like following fig., then the corresponding potential energy is given by,

**Potential energy = m x g x h**

** = W x h Joules**

Where W= Weight of the body, g = Gravitational force

The relation between power and energy is given by.

**Energy = Power x Time = Work Done**