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Angular Acceleration

Angular acceleration is created by identifying the rate at which the angular speed changes with respect to time. We can name this a pseudo-vector because of the presence of 3 dimensions in it. We can represent angular acceleration as rad /sec2⁡. We can denote it as 𝛼. So, we can write the form of angular momentum as follows


Where 𝜔 (can be spelled omega) is nothing but vector, which illustrates angular velocity.

On the other hand, angular acceleration presented in the provided particle is easily connected to torque (which can be represented as 𝜏) giving the following equation -

I α= τ

Where α denotes angular acceleration and I denotes the inertia of the particle.

Determination of angular acceleration

With the help of angular acceleration, we can adjust the angular speed which is separated by the change in time. With the aid of this, normal angular acceleration can be obtained effortlessly. Angular acceleration focuses its path towards the pivot. The following equation can be utilized to obtain the extent of angular acceleration.


From the above equation,

Some reasons for how angular acceleration is caused: In physics, pivoted objects namely bar, plate, 3D shape, etc. have their mass positioned through space. We should take the source of power into consideration to identify where it is connected. In places like this, the usage of torque is being introduced. We can define torque as an energy that turns objects or particles in a particular direction at a particular speed. It can also serve as the proportion of the volume of power that can cause a revolution. It can go starting from the linear motion to a defined angular motion based on the situation. Torque produces rotational motion. We consider it a vector. The magnitude produced due to torque encloses the torque capacity to make a revolution. Torque size is proportional to the angular acceleration it produces.

Important terms associated with angular acceleration

Given below are some of the common terms that are associated with angular acceleration.


The idea of torque was first invented by Archimedes on the use of switches. Just like linear force, which is nothing but a push towards the linear direction, torque is almost the same but with twist force. Torque is denoted by the symbol 𝜏. We can spell this as tau. Moment of force is represented by M.


Since torque is contained in three dimensions, we consider it a pseudo-vector. For point particles, torque is provided by the cross result of the position vector and the power vector. In this, we can also describe the position vector as a separate vector. The magnitude of the torque relies on three variables, namely the applied force, the switch arm vector, and the angle between the power and switch arm vectors. The formula for torque is -


τ= ∥r∥  ∥F∥sin θ



= torque produced

r = radius vector

F is the force vector radius vector

SI unit of torque is N-m

The magnitude of torque is,

τ= r F sin θ

In which,

r = distance between the axis of rotation and the particle

F = applied force

= angle between position and force vector


Angular Momentum

Angular momentum is nothing but the rotational force which is considered a very important element in the world of physics. Since angular momentum has three dimensions, the point particle can be a pseudo-vector (r * p). The position vector of the molecule is given as -

p = mv

Angular Velocity

Angular velocity is also described as the speed of the particle or an object. Angular velocity is the rate at which an element pivots around some fixed focus points. A real-time example of angular velocity would be how fast earth can revolve and rotate around the sun in space. Its SI unit is rad/sec. Angular velocity can be denoted by 𝜔. If an angular velocity is positive, then it illustrates that the turn produced is anti-clockwise. Meanwhile, negative angular velocity indicates that the turn is clockwise.





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