IIT (NTSE/Olympiad)  

Circular Motion & Rotational Dynamics

4. Angular Acceleration

4. Angular Acceleration
The rate of change of angular velocity is defined as angular acceleration. If Δω be change in angular velocity in time Δt, then angular acceleration

(i) It is a vector quantity
(ii) Its direction is that of change in angular velocity
(iii) Unit : rad/sec2
(iv) Dimension : M0L0T–2

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IIT (Class X)