Physics Lectures Practice Session Testing Mode Video No. 19

Testing Mode Video No. 19 Module # 20 Angular Acceleration, Dimensions & Error Propagation Instantaneous Angular Acceleration If angular acceleration is not uniform during the interval of time ‘t’, then, we find the instantaneous angular velocity at any instant. Instantaneous angular acceleration is defined as the angular velocity ’Δ’ during a small interval of time ’Δt’ approaching zero. Mathematically, it is given by the relation. Δ  = Lim -------------- Δt0 Δt Note: If angular acceleration is uniform, then, both average and instantaneous angular accelerations are equal. Instantaneous Angular Velocity If the angular velocity is not uniform during the interval of time ’t’, then, we can find the instantaneous angular velocity at any instant which is defined as the angular displacement in a very small interval of time. OR The angular velocity at a particular instant